hehehe ..
persoanlly I love the Thermaltake Armor case.. just take out the HD rack next to the PSU... I put my hand in the back of my case and the air is blasting through the case..
Just gotta wipe off the front of the case every month or so.. all that air it sucks through the case... dust builds up on the front filters..
but thats a good thing means its pushing some serious airflow
Personally, I hate my Cooler Master case. If I put my hand in the back of my case, I can feel a slow, tepid, and altogether pitiful stream of air as it endlessly recirculates, doing naught to cool my computer and bringing ironic shame to the name of "Cooler Master."
At least I don't have the bothersome problem of having to clean my case
The thing sucks too much to need cleaning. I've replaced the fans and everything, the thing just sucks overall at circulating air.
On a different note...I think that if you want a true gaming/overclocking case, you might go for a Lian Li case. One of my friends has had great success with airflow and cool components in one of those, despite the fact they cost a more hefty sum than some others.