Re: Power Supply...
If you are running multi GPUs, make sure you don't go for an EPS12V spec PSU, as they are designed for servers and will be supplying two 12V rails to the CPU, and the GPUs will always be sharing with other components.
Stay away from the cheaper Antec units, they are manufactured by low quality OEMs. Anything from Channel well (Thermaltake Toughpower, Xclio Greatpower, Xigmatek lineup) will be of good quality. OCZ's OEM is the FSP group who are a reputable manufacturer.
And last thing, make sure you look for an "80 Plus" efficiency rating.
AMD Phenom II X4 955 BE @ 4.0GHz + TU120E lapped - MSI 770-CD45 AM3 - 2x2GB OCZ DDR3 1333MHz - Sapphire HD 4870 - Samsung Spinpoint 500GB 7200RPM 16MB cache HDD - Tagan TG600-BZ Piperock - (Currently open test bed) - Windows Vista Home Premium 64bit.