Depends on what you want. If your main purpose is gaming then for sure go with the GTX 760 and FX-6300. In fact, I have the 6350 (higher clocked 6300) and a GTX 770 and have no issues at all really. You always want the GPU to be really strong in a gaming PC and the most costly part, and a 660 won't really cut it for modern 1080P gaming.