Look dude, if money is no matter to you, then you should seriously consider going for these:-
1.Radeon X1900XTX in Crossfire mode
2.eVGA Geforce 7900GTX 512MB Superclocked
3.XFX 7800GTX Extreme Edition
4.And finally the WORLD's MOST POWERFUL SETUP IMPLEMENTED TO THE DATE,viz. 7800GTX with 512MB of DDR3 in A QUAD SLI SETUP!
Feast your eyes boy, these are the most innovative and powerful combinations available around.