titaniumx3 said:For the PSU, you'll need to check the 12v rail ratings; ATI say you should have 30amps for an X1900 XT system, but to be honest I've seen plenty of people running X1900s with considerably less.
Personally I'd go with an X1800XT as the X1900 is somewhat overkill, well it is in my system and I have similiar specs to you. You could also do some overclocking on your CPU if want to minimise the bottlenecks.
Yeah i think the X1800XT as well.
Sapphire? I've heard good things about them. Also how would i check the 12v rail ratings?

Plenty on 