As many of you may have read, I just ordered a Dell XPS 13. It is a P8700, 4gb DDR3, 128gb SSD and 256mb graphics. Seems to me like it should perform very well. It came with Vista Personal. Through my school, I can get XP Pro 64-bit or Vista Business 64-bit. I plan on wiping the computer anyway at the beginning to get rid of Dell's bloatware but was curious which you guys think I should install? I obviously could save about 15-20gb going down to XP Pro (which I am using now). What do you all think?