I had an MSI RD480 motherboard, and i just upgraded to an abit AT8 Xpress 200 chipset and Crossfire.. and it is good with overclocking to.. it is a very stable mobo, but i had to turn of a sensor or 2 because they were defective and making my mobo do a constant BEEP.. but it is an very Good mobo.. i am trying to find a powersupply right now.. Maby a Hyper or somthing for my X1900XT that i am getting..
Enermax Liberty! Get it... it's awesome! http://www.newegg.com/Product/Product.asp?Item=N82E16817194003 A 500W here. There's also a 620W and 400W model. All extremely stable and OC friendly. I swear by it, best power supply for your money.(Unless you get the PC Power and Cooling 1KW... that's good too.) Also, 512MB X1900? Just ATi could mean anything. But if your hurting for performance on a budget... X850XT and X1800GTO are the only high performance cards in a decent price bracket. Whatever you wanna get, I recommend 'em both. Both between $150-$200. I don't know the price of LCDs as I have a $120 17" Sony CRT, but I reckon you could get something pretty nice for $200.
it looks kinda expensive for a 500W, how about this? http://www.newegg.com/Product/Product.asp?Item=N82E16817128002 I herd Hyper was a good brand.. Get back to me.. FIHSNERD
Hiper is very good. Yuck! modular though! Modular is fine for your average user but It can sometimes result in lower power levels all around. Not good for OC'ing and such. And, no, not too expensive for 500W. Liberties are extremely stable, powerful, and reliable. Trust me, you wont be sorry.