That build is fine. The Corsair Builder 500w is an ok power supply. Though if you're going to use that build for gaming, you should consider an r9 380 which i think is cheaper but a bit stronger than the 960. Overall that's a good build. but i think you should buy a cheaper i5 like the 4460 rather than buying a K version and see if you can fit an r9 280x in the budget.