I am wondering for when I get my 2.0 alu MB... Which preforms best on the MacBook? I realize that XP is obviously less intensive, but I do like having the newest and "best looking" OS. Is vista at all slow or laggy on a 2.0 MB compared to XP? And also, I am sure someone will ask, I am able to get vista from my school and I have a currently unused copy of XP so I am not pirating D=<.