Since I haven't really been paying attention to CPU blocks since the Storm was all the rage I must now go check out these Apogee blocks...Thanks odditory.
Yes...all the extra crap that noone tells you about...definetly need all that. Jab-tech has alot of cool stuff to choose from and alot of colors also.
hose clamps - basically 2 types, the plastic snap on which you can get in different colors or the stainless steel screw on type
fan screws - all depends on how you are mounting the fans, whether you have shrouds or not, what type of grill you use, whether you want to use nuts or use the fan mounting hole as the nut. All that makes the length and size important as well as the color of the screw if you are that particular.
fan grills - Tons of these to choose from. I use these because they look great, keep alot more dust and trash out of the case and the screen is removable for cleaning without taking anything apart.
http://www.jab-tech.com/120mm-Black-Frame-Aluminum-Fan-Filter-pr-2696.html
fan controllers - You may want 1 or 2 of these depending on the number of fans you end up with just to keep the noise down. With numerous fans cranking wide open it does get a tad noisey so this will let you turn them down but still maintain decent air flow and turn them back up if you really get the PC cranking on some heavy stuff.
coolant or water additives - Personal choice on this. Just remember that algae build up is always a concern and alot of these things help considerably. Keeps you from draining and cleaning when adding some of this would have stopped it.
shrouds for the rad - This again is another arguement of alot of people. Some say it makes a difference some say it doesn't. Read around and make your own decision. Most rads have shrouds available, just gotta search for them sometimes.
tubing support such as cool sleeves - I personally recommend this for the tubing. They are a pain to put on and take a bit of time but it keeps the tubing from kinking and slowing down flow and they do look cool if you have the proper lighting.
Artic Silver 5 - A must in my opinion. At least this used to be the best. Might be better out there now but I doubt it.
Can't really think of much else. Have fun...