What's your budget for the PSU?
The Sunbeam Nuuo 550W isn't too bad - Deal on Newegg - save $20 = $55
Also there is the Mushkin Enhanced 550W, which is better than the Nuuo, although more expensive. $95 - $20 MIR = $75
Both are pretty good, if you're looking to save money, get the Nuuo. The Mushkin should be better though...(at least on the tier charts)