It has always been my opinion that a smaller case is better because what's important in case cooling is to:
1. avoid eddy currents of hot air that go nowhere
2. exchange the air in the case as often as possible
I've been reading a lot of hardware builds and case reviews (I've been bored) and they frequently look for really big cases.
So...would someone please tell me why a bigger (cavernous) case is alledgely better for cooling.