Everyone has an opinion about power supplies, because power supplies are important. A bad one will crap out on you at the worst time, leaving you with a nonworking machine--or worse, one that’s fried. Corsair’s AX1 series walked away with 61 percent of the vote; the silver and bronze winners got eight percent each.
Corsair AXi Series
"If it’s not Corsair then it isn’t a power supply."
Rosewill Capstone Series
"For a power supply line in general, I don't think anyone has managed to beat the Rosewill Capstone's combination of price, performance, and reliability."
SilverStone Strider Series
"I have the Strider+ 850 (which would be plenty for dual GTX580s) and I am extremely happy with it. It's been rock solid, and provided clean power for my overclock