I got a Dell Precision M6500, from their Business Outlet for about $2500, it has 8Gb ram(1333), 1Gb Quadro3800, i7(860), and 17"RGB display(1920), wifi(N), about 2.5 to 3 hours run time on batt., built very well, metal casing, you might also want to look into the Alienware laptops.
I've been...