That looks like a very solid build for $600. Good job on using sales! The only thing that bugs me is the low quality case, but with that performance at the price it's still a fantastic build. You should be able to get ultra settings on any game, but maybe not with anti-aliasing on. Maybe some of the higher games you'll have to change some things to high, but still amazing for the price.
What is the brand and model of the psu?