Nice build and good bang for the buck, one of the better builds i've seen recently. one thing that came to mind, do you ever plan on crossfireing that 7850 in the future? if so, you may want a beefier PSU. other than that it looks good to me.
You can get it for $85 if you get it before 7/25. I love the Rosewill Capstone Series. I got the 550W version for $67 on a sale about a month ago, and i'm super happy with it. it's quiet, heavy, made by Superflower, it's a beast.