Not a fan of that Ultra LSP650 650W.
If you look at the data label you'll see it has +12V 456W, or 38Amps (456 ÷ 12 = 38)
That's more like a 550W PSU.
Compare that to the XFX Core Edition PRO550W (44A), OCZ ZS Series 550W (38A) or OCZ ZT Series 550W (45A) that Rolli linked.
Plus you get higher efficiency, better quality and a longer warranty.