Antec make some pretty solid cases, however I would highly recommend a TA (Thermally Advantaged) chassis. It ducts the hot air directly from the CPU as opposed to relying on conventional exhaust methods, such as PSU & secondary fans.
With a 3.4 in that case, heat 'may' become an issue.
You would probably do better off with a Performance case, or maybe a
solution TAC case.For more info check out Intel's website for 'Thermally Advantaged', and you'll find useful info, and 'certified' cases.
Also AMD has some great info on cooling, some pretty basic physics stuff, but it will make interesting reading. It will also set you right on some things you read on internet forums about cooling.
