Newegg has an Antec 300 Illusion which comes with 2 extra front fans over the regular case for $55.
Tiger Direct has the HAF 912 for $49, but that has less fans and is an inch over your depth requirement. Tiger Direct also has the Corsair A50 air cooler for $25, which I just bought myself and does really well for the cost.
I'd buy the Corsair A50, spend the $25 and see how that does.
Then if I had to buy a new case too, id get the 300 illusion since I already have one and its worked stellar for me and it has twice as many fans as the HAF 912 for $6 more.
Core i7 2600k/ ASUS P8Z68-V Z68/ 8gb Corsair Vengeance 1600 Blue/ EVGA Geforce GTX 560ti Maximum Graphics Edition/Windows 7/Antec 300/Antec 650w/LG Blu Combo/Hp 27inch 2710M/Samsung P2770HD
"I think sharing is overrated...and helping others. And what's all this crap I've been hearing about tolerance?"