I m sure you know that Geforce(or even Radeon) series of GFX cards is not officially
supported by 3ds Max or Maya then you may have to buy a Quadro series card(official support for 3ds Max/Maya) but then you may
not get the desired performance for gaming with it. Other was is to buy Geforce 400 series card but again it has bad points. last option is to go with a Radeon card but will miss CUDA, although CUDA is not used by many renderers there is one called Arion(by Random Control) which utilizes CUDA, its in early days and has a very good potential of becoming a mainstream renderer.
Check it out here: