New
#21
Personal Choice: OCZ ModXStream Pro Power Supply - 600-Watt, Modular, Dual +12V Rails, SATA, 80Plus at TigerDirect.com
Corsair TX650W 650-Watt Power Supply - ATX, 120mm Fan, SLI-Ready, SATA-Ready, 80Plus at TigerDirect.com
OCZ and Corsair are some of the best. I also like these because they are modular.
Edit: Oops...Corsair isnt modular sorry for bad info....
They are both 600+ which will give you plenty of overhead as PSU's degrade over time. The first one cost the same as the one you were looking at.
The PSU is the life-blood of the machine and should be a purchase in which you try to get the best PSU you can for your budget.