My rule of buying PSUs :
"Your PC isn't as good as you think it is!"
Firstly, you don't need a 600W PSU. Or even a 480W. The only reason I'm getting a 450W is because I plan to have around 25 LEDs, be running 6 fans and possible get water cooling, with a double fan radiator. A 400W should be fine for your setup.
Antec are no where near as good as they used to be, but they are still pretty good. Tagan have really come out shining, and these are some companies I would not recommend touching with a barge pole, let alone an SLI system (note : these are almost the same as the ones listed here :http://www.xtremesystems.org/forums/...1&page=1&pp=25
just though u should know this guy has done most of the research
E-power (except Tagan series)
Thermaltakes (low end ones, butterflies are fine, and some enlight models, the TT category depends)
Ultra-X (yes, the pretty looking ones, they are made by a low-quality Chinese company that starts with "Young". Can't get much more generic than that!!!)
So, stay away from them! Also, check out the page above for some really good PSU stuff.