I would stay away from things like that. Stick with a brand like corsair. You could get a HX750 and have plenty of room to upgrade or, if you feel you really need a bigger PSU get 850HX. Dont go higher then 850. If a PSU is running at low load you get bad efficiency, you also get bad efficiency at high load. 750HX corsair or 850HX corsair would be plenty!
Actually, you want to be near those PSU, because a lot of Antec, Corsair, and others, are manufactured by them. Did my research.
do the same as me, and you'll get a quality suply for much less the price