My school is having a special sale on some refurbs... should I do it? I've been looking for a replacement for my Powerbook 12" for a long time now. The footprint of the MBA is still bigger than I'd like, but one major plus for the MBA is that the screen is so much nicer than the dim PB screen. I could use the PB as a "base station" for drive sharing, wireless internet sharing (since I live in a dorm and don't have a router), stuff like that. I basically need an ultraportable that will run for a decent amount of time on battery. 4+ hours for light usage from the MBA is okay, but not stellar. I've also been considering the Vaio TZ (6-7 hours) and the older Vaio TX (9+ hours), and the Lenovo X200 (9+ hours) The biggest selling points for me are the sexiness, and the OSX-ness. I have lots of apps that are OSX only and have no Windows counterparts, like Pages/Keynote and OmniOutliner.