I'm looking at an i5-3570K, which I can get in a bundle with this Gigabyte Z77 mobo. That's already around $350, leaving only about $450 for mid-end but relevant GPU, case, and 1TB HDD, RAM, PSU and aftermarket cooling. For the GPU, I guess my best deal would be something like this 7790, which leaves me $300 for case. However, if I can fit a GTX 660 somewhere in there, that's be great, so I can get PhysX and CUDA. Nvdia doesn't seem to have a product in the same "tier" as the 7790 though. I don't think I can get a 660 with enough money leftover for everything else. Any suggestions?