This is the one I have http://www.newegg.com/Product/Product.aspx?Item=N82E16817139009
not that I needed this much power for what I run but its what the store had. Its very good and should run you just fine.
other than that hit newegg up and go advanced search on power supplies and under SLI type select crossfire ready or certified. You definitely want 750w+ imo.