It really depends what you do. Alienware and dell had a match up with alienware using the mobile x800 and dell using the 6800go. The alienware scored higher but then dell overclocked the vid. card and achieved good fps. So it depends on preferance, for which company you like. I prefer ati because right now they're at the top of heap... lol... sorta... the 7800gtx and the x1800xl... you decide... but, for mobile use, I'd go with the x800. But, with the new mobile x1600xl, there's no question, is there? lol...