Tigerdirect has a Thermaltake 750 watt psu with an instant rebate down to $65 its seems to be good, and should be better than the raidmax 500watt i got now. I know 850 watts is overkill with a single gpu, but its similar priced to a corsair/ocz 600 watt psu, or 500 watt seasonic pcp&c, etc
"Thermaltake TR2 RX 750 W is, according to our methodology, a flawed product that must be avoided at all costs. It can’t deliver its labeled wattage at high temperatures, but this is not the worst of it: ripple and noise level are way above the maximum allowed when you pull 80% or more from the unit’s labeled capacity (i.e., 600 W and above), overloading your components (especially electrolytic capacitors from the motherboard and video cards), which can cause your PC to present an erratic behavior (crashes and random resets) and, under extreme conditions, damage components."
Okay down to 3, the Corsair 600w builder, Rosewill 630watt green, and rosewill capstone 550m, any good reason to pick one? the corsair had a rebate, the green series has $10 off and the capstone has gold 80 plus