I've got a Nvidia GeForce 7900GT 256MB DDR3 Dual-DVI if of any interest?
Ive completed COD4 at 1680x1050 at medium settings on it, and handles most games fine, even can play Crysis with med/low at 1680x1050 or medium at 1280x1024
or could do a 7800GTX 256mb instead if preferred. very similar (identical basically) in performance.