So here's my situation: I currently have XP loaded in parallels, but I want to make a boot camp partition so that I can run windows natively for a couple of games I have (they stutter and skip under parallels). So the question is: should I install XP or Vista once I am ready? I will also use the boot camp partition as my new virtual machine for parallels once everything is "settled in". Some info: I have a Early '07 MB: 2.16GHz, 2GB RAM, GMA950, 120GB HDD I am for sure looking to play Portal (from the Orange Box) and perhaps a few others. I have copies of both XP Pro and Vista Ultimate, so, which would be advisable? Thanks for you input all!