people who use the 11' Macbook Air as their main home machine miss the point...
Macbook Air 11' is perfect for work and travelling....for your home you need a desktop machine like a mini with big Display or iMac.
Well, my whole point was using an MBA for desktop work at your school or workplace. The 13' is the perfect comprimise for size and portability IMO. Again, it all depends on your needs. If your gonna take your MBA with you to school or work every day, in the long run you will probably be more happy with the 13'.