I need advise on a mid tower case for my pc with excellent ventilation and which supports usb 3.0. It would be used for heavy gaming. my gpu is 6950. budget max -- 3.5k
Cabinets, which are just the best in Coolings, but not with USB3.0.
1). NZXT Gamma [~2.2k] - Best in terms of looks & coolings.
2). CM Elite 430 Black [~2.7k]
3). CM USP 100 [~3.1k] - Best in Terms of Cooling & Space
4). CM K100 [~3k]
With Front USB3.0
5). CM Elite 311 Plus [2.9 at Primeabgb]
6). NZXT Source 210 Elite [~3k at Primeabgb]
7). CM HAF 912 Advanced [~5.5k]
My Vote goes to NZXT Source 210 Elite for space, coolings & Price. But if you can increase more than just think about CM HAF 912.
Also take a look at Corsair Carbide 400R
Another option is to get a cabinet without USB 3 port and purchase a Cooler Master USB 3.0 Adapter which fits in a 5.25"/3.5" inch drive bay. This is available from SMC @600 bucks. Pair it with Gamma and you can actually save some bucks.
Other : Cooler Master USB 3.0 Adapter - Rs 600 with Free Shipping