FoxFornax :
I am using the Coolermaster HAF 912. I have 5 120mm fans in there running at 2000 rpm a piece! I am using the stock cooler on the CPU though. I am hoping to get an after market cooler soon.
Check out my build (hover over my picture). I've got the same cpu, and I use the CM Hyper 212 Evo. My cpu stays in the 50c's, typically.