If you want it to be good for maya, then look for a qualified card on Autodesks site, then again if you get one of the 7000 series Gforces that works well with maya and is good for games.
Not too sure what the prices are but Ive got the 7900 GTX 512MB card and it works great with maya, but I dont know the proce for it.
"No pressure, no diamonds" Thomas Carlyle