I'm looking at laptops for college. My school is offering a Thinkpad with a Nvidia NVS 3100m, but I could get a HP ENVY with a ATI HD5850 for a similar price. I need this to be a desktop replacement that would work for both CAD and gaming. I know the 5850 will work great for gaming and the 3100m probably won't. However, even though the 3100m is a workstation card I can't imagine it would perform better than the HD5850 with how wimpy the NVS 3100m seems to be in straight horsepower. Any opinions or recommendations for a laptop in the $1800 price range?