The build looks good. I would change a few things though. I would go with the 520W Seasonic PSU: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
I would go with this PSU because of 2 reasons:
1. Seasonic is one of the best PSU manufacturers out there
2. It is 80+ bronze certified while the Corsair CX500 was only 80+ certified.