Hello I am building a computer, so far I only have a gigabyte z77-ds3h (no amazing I know), and a case. I plan on using an i5-3570k, w 8 gb ram, and all the other less important stuff. So far I am thinking of a 7850 for my gpu maybe a gtx 660 (not ti, I cant afford it). Is there graphics card for less, that would deliver decent performance on high or ultra for games like planetside2, metro, saints row, battlefield 3 (and 4 if they make one)? I have looked at gtx 560 and 570 ti, 6850 cards, but ive seen benchmarks and hey are good, but no great. Any help?