My last PSU was a GS800 and it is a very solid PSU. Incredibly good voltage regulation. The only thing I didn't like is that it wasn't modular. I've never pushed it much past 450-watts worth of load off the wall though. Generally speaking, I would expect a Corsair PSU to be decent. Personally, I would want 1000w if I were in the op's position, but that's just me.