I'm going to answer this as simply as possible: Rosewill mechanical keyboards are a "GOOD" gaming keyboard. That is to say, it's the bare minimum to make the cut for me, and at 100$ they trump most mechanical keyboards 50% more including the das keyboard in terms of build quality. They're amazing for the money, but can and will have issues with the USB port, far more likely if you move your keyboard around alot. (if you pick up your keyboard and you don't see a perfect dust outline of where it was, it's probably getting moved around enough to cause that usb plug to fail)
Below are my personal reccomendations for which switch to select for the application at hand (Please note, while these recommendations reflect my personal experience with the myriad of mechys I've used, this would qualify as anecdotal and opinion if anything. I think it could be used as a reference for a quick and easy selection based on your primary gaming habits; and I hope it helps demystify the nature of the different keys available from Cherry*.)
Real Time Strategy:
(Starcraft 2, League of Legends, etc)
I'm currently using cherry MX reds for my Starcraft play, but I found that cherry browns and cherry blues were sublime with Starcraft 2. It seems as if the feedback is extremely helpful in a game where you're issuing several commands a minute. As a general example, if you're gold or above, your APM is at 40+; the feedback you get from cherry browns and cherry blues helps you more consistently hit the keys you want to hit and get reassurance that you hit them or that you didn't. I'm missing keys with my cherry reds when I know I didn't with my cherry browns. (for clarification here: it's not that I'm entirely missing the key with my finger, it's that I don't get any indication of when the key actually sends the signal to the computer, so for example, if the signal gets sent at 50% key press, it's really easy to get to 49% and just never get a keypress sent, but with blues or browns you get a characteristic bump or click; that tactility confirms to you automatically that you hit the key, and I feel like you're at an advantage when you know at a muscle level you hit the key)
Top picks:
Blues and browns.
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First Person Shooter:
(Unreal Tournament, Quake, Counter Strike)
I found that cherry reds were wonderful for shooters, as were cherry blacks, although I think blacks and reds sacrifice too much when it comes to everything else. I'd select browns here as well. I just feel you get a better key stroke length, better feedback, and generally enjoyable experience everywhere, but if you're not immediately put off by linear switches... I don't know what it is about linear switches for FPS gaming, but it just works so well for me. I honestly can't say exactly what it is, but I've just always loved linear for FPS. Given my choice of any keyboard, it'd be blacks for shooters... or reds if you prefer a lighter switch. A fun way to test actuation strength is to use nickels, if you browse geekhack a lot there's a strong chance you've seen pictures of one of ripsters keyboards with a chrome ball on one of the keys, or a bunch of nickels stacked up... each nickel weighs 5 grams. So for cherry reds, imagine exerting the same amount of force that 7 nickels would apply to the key (35 grams), and for blacks you'd need 11 nickels (55 grams). Feel both in your hand and you'll get a good idea of how hard you'd have to press the key. If you can't live without feedback, I'd say browns... but if you can either reds or blacks are solid choices.
Top Picks:
Reds, Browns, and Blacks.
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MMO's:
(World of Warcraft, Star Wars: TOR, etc)
Really, any keys. All my reccomendations really are for esports guys who want to min max their keyboards. MMO players don't need maximum performance (no offense to you hardcore arena players, but seriously), they're better off focusing on the keyboard they most enjoy typing on especially since MMO's are rarely short lived experiences, my guess is you'll wear off the letters on most key caps before quitting whatever MMO you're on. I was a WoW player for quite some time, but eventually grew pretty bored with it. But, from my experiences, and knowing it's a game prone to long drawn out sessions, I'd say primarily choose whatever's most comfortable. For me, I prefer typist keyboards for WoW (blues, primarily). World of Chatcraft is exactly that and you'll spend a ton of time just typing stuff, googling stuff, etc. It's a very typing intensive game, but for the mechanical elements of the game (IE, raiding, pvp, etc.), I'd say my RTS reccomendations are the most appropriate. That said, I still think comfort overrides all for long haul games like MMO's.
Top picks: Blues and Browns.
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For everyone else, refer to this guide:
Blues click when you press them and have a resistive bump. The deactuation point is above the actuation point, so the key presses are sometimes hard to continuously actuate (double tapping is not as natural feeling). Basically the problem is that when you hit a key, there are two signals sent: key_down, and key_up. when you press it down it sends key_down, or at least this is how many programs interpret a keyboards behaviour; and on release of the key, you get a key_up. I'm not a hardware guru so I can't quite tell you exactly how it works, but for the sake of conveying the right idea, I think this helps. Basically, with blues; the key up point in the switch is higher than the click, so some people have trouble reliably getting to the key up, before again pushing the key back down for another key down. In short, the tactile bump is really useless for key releases, but feels sublime on key presses. =D
Browns don't click and have a resistive bump, the feel is similar to a mix between reds and blues.
Blacks have no bump or click and are very stiff, hard to type on.
Reds have no bump or click and are very light, also somewhat hard to type on but if you get used to it can be nice. It's what I'm rocking at home.
Don't concern yourself with
Clears.
If it's not mechanical, it's not a GAMING keyboard. This may seem like a really stupid thing to say, but if you consider a keyboard in the same light as a mouse it starts to make a lot more sense. Obviously, your OEM dell mouse is nothing compared to a really high end gaming mouse. That gaming mouse is so good because it utilizes a top end sensor, great mechanical switches for the buttons, and they usually come with some flash and awe to get them moving off the shelves. I think with this in mind, my statement makes a lot more sense... it's just that far more people are going to notice an improvement between a crappy mouse and a good mouse than those that will notice play improvement from a keyboard. Pretty much anybody can feel the difference between the various cherry key switches, because they're extremely different feeling... but that may not necessarily convey that it would improve your gaming. Basically, gaming mice are the best of the best of the best in the mice world. There aren't any office mice that can out track a deathadder... so why would we settle for an oem keyboard if oem mice won't do?
OVERALL, my top pick is:
Rosewill RK9000-BR, or the
Das Keyboard Professional Silent (ultimate if you want blank keys). Cherry browns are just such a great gaming switch. They have tactile feedback, but succeed where blues fail; and they're light enough to actuate that they're not a burden to type on. The
Razer Blackwidow Stealth Ultimate (THE NON ULTIMATE IS NOT 6KRO) is one of few options for a truly high end gaming oriented keyboard in my opinion (IE, macro keys, backlighting, and other features that gamers tend to enjoy). It uses browns, has audio plugs, backlighting, etc. Just keep in mind the software is ***.
Finally, an "ultimate" gamer/geek centric guide at another well respected forum:
http://www.overclock.net/t/491752/mechanical-keyboard-guide
*aside from an old buckling spring I've tried, the only mechanical switch I've used besides cherrys are the alps blacks. I wanna say they're the "simple" variety, whatever was in the ABS M1. That board was unusable prior modding, but I took all the tactile bump parts out of the switches and what I got after that was something similar in feel to reds, but with a slightly shorter feeling throw and a bit more grit in the keystroke. Overall it wasn't a quality board, but it was 20$... so I ain't even mad.