if your case has a CPU cut out i would definitely go with the cm hyper 212 evo i installed mine today and once the backplate was on the rest was easy to install just make sure that the clearance from the motherboard to the side panel is about 160 mm or 16 cm. It keeps my 955 be at 38oC at 40% fan speed and the only thing that prevents my pc from being silent is my psu fan.
are there any that are cheap and somewhat decent that are like a stock fan? just a heatsink straight on the processor with a fan on top? i dont really need anything fancy for this build, i might just use my old AMD 9650 x4 2.3ghz fan. i dont remember it making all this noise