Verdict
All things considered, it's a draw. The Air is faster, nicer to look at, easier to use, and is ideal for passing around via internal office mail -- but the Wind has its advantages too. It's super-affordable, can keep up with the Air in most performance terms, and is the more flexible machine.
If money is no object, get an Air. If you're broke, buy a Wind. Unless, y'know, the Newton rocks your boat.

