I usually wouldn't recommend an Evga PSU but the 80 + Gold certification and 10 year warranty kinda makes it easy to pick the Evga over the XFX. Plus Evga has always provided excellent support. I'd also take a look at the SeaSonic X Series X650 Gold it's only $5.00 more using the promo code: EMCXNVR26. It ends 7/31/2013 but it's a much better unit in my opinion. I own 2 Seasonic power supplies and highly recommend them.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151088