Hi, I am going to buy a MacBook Pro once they come out on Thursday, and going to load it up with Parallels Desktop, I used the search bar and found nothing, so I have a couple questions: -How much does Parallels effect the battery life? Does running Windows under Boot Camp allow for more battery life, or what? -I can get Windows XP Professional 32-bit edition for $49, or Windows 7 64-bit for $79, which one should I get? I've used both and enjoy both, but which one particularly runs better with Parallels? -Is running Parallels off a Boot Camp partition just as fast or is it better to have a separate Parallels disc image? Thank you!