After exhaustive research in a PSU upgrade on my system last month, I bought an Antec TruePowerTrio 650w. Except it was missing a certain -5 volt rail that my motherboard required. If I had your system, then I would get the Antec. All the newer motherboards don't need that -5 volt rail so I think the Antec will do you good.
My mobo is an Intel socket 478 and requires the ATX 12V 2.01 spec, whereas pretty much everything made after that followed the ATX12v 2.2 spec, which deosn't need the -5 volt rail. Just a minor thing.
later