In this case your budget is your limit. A good idea is to go to PC builders websites, like ALIENWARE.com, that let you customize your own PC. That way you can see what parts you want as well as what it will cost you to have them build it. Of course, building it on your own would be way cheaper, but then you don't get the tech suport and warranties.
Basically, the better the system the better Maya will run.
: Poser? Are you for real?
Professor of Digital Arts
Digital Media Arts College
Boca Raton, Florida