I think you will have to add atleast 5 bucks more to get something decent,
at
case-mod, you can get a few good ones for around 20
for ex. volcano 9, is a nice one
but my best advice would be two things.
1. post save up some more, and get one of the best one, which only tops in the 40, and is something you can use over and over again, if you buy a cheap one now, and later want better performance, it will cost you even more to get the best ones. but is your money, and you must decide that, in any case good luck
2. Next time try to post in the correct, forrum section, for example this thread should be listed in just cooling