Corsair does not actually make any power supplies. They rebrand power supplies made by Seasonic, CWT and Flextronics. They are a quality brand though.
Corsair, Seasonic, PC Power and Cooling, XFX, Silverstone, Enermax, OCZ and Antec are all brands you can't really go wrong with. For the specs you listed a ~500w model from any of the above brands will be fine. If you plan on adding a second card in Sli then go with a 700-750w model for futureproofing.