Hey - I just upgraded to a macbook with 120gb, 2gb ram, 2ghz processor. i want to run windows on there occasionally, but not sure if i should get vista or xp. i'd like to get vista, because it's so damn pretty (i think). ideally, i'd like to have vista ultimate on there. but i don't want to get vista if it won't run quickly and efficiently on my mac through parallels. should i just stick to old-fashioned xp?