dell for starters, sony tend to put in the radeon IGP's which share system ram....a no no for gaming, erm people like MESH, and Rock Direct have srigs with these cards, and also Acer have some nice laptops too, acer sometimes use the mobility radeon 9000, which while is only Direct x 8 (not 9 like the 9600-700 and 800) it is still a good chip, my freinds centrion laptop from them had this chip an it played C an C generals sweetly at over 1024x768!
i livein the UK so comapies like MESH and Rock may not be available to u so try dell, i think their gaming laptops are called the XPS or somthing.....they also have interchangable graphics chips so u can upgrade in the future