I'm not an expert, but nobody else seems to reply...
Ok officially TheSims2 doesn't support laptops. But i do have a laptop and it works. It is just very slow loading the game (25 minutes!) but i have a lot of cc. Vista requires more memory than XP but you have 2 Gb so you don't have to worry. If there will be any problems, it will be with the graphic card. Other people have the same video card and Vista and ts2 seems to work. Please read this post:
http://www.insimenator.org/showthread.php?t=35434Anyway it seems to be a good and powerful laptop and if you can buy only a laptop you can try it!