So during the black friday online feeding frenzy I decided to purchase a Cooler Master Real Power Pro 750W for my future 8800GT card. I have a modest system: a core2duo OC'd to 3.2ghz, 2 gigs of ram, 2 IDE drives, 1 SATA drive, and 1 DVDRW. What I am wondering is if this PSU is waaay more than I need? I'm guessing it is, but my concern is will it be sucking extra power idling and adding to my power bill? Would I just be better off picking up something nice like a Corsair 620W? Are the corsairs typically more energy efficient? I've been noticing some good reviews of the Real Power line, but the fact that they are always on sale and part of rebate incentives makes me question their quality.