So I have 2 monitors (23&24 in) and have 2 graphics cards (2 Nvida GTX 460's). I have the option of getting a new graphics card this Christmas and was wondering does having a single 600 series Nvida graphics card beat out having 2 460s, and/or can I use 1 of the 460's with a 600 series? If you need more specifics about my computer please feel free to ask.