as of now I would like to add a third monitor to my setup so I need a new video card. as of now i have the 1900xtx but i was wondering if I could improve and get a better card along with this one.. for example... can i mix a 1900xtx with an 8800/9800 or is it better to stick within the same setup and run 2 1900's which i dont know how well it would work do to drivers... ANY help would be appreciated.