Comment Trick is not paying microsoft tax (Score 1) 708
If you can find something like the Dell Vostro v13 with linux preloaded (I did this a while back and got a nice ultralight for around 550 USD), you can avoid paying for Windows when you don't really need it.
I run both this v13 with Ubuntu, and a MacBook Pro. The v13 + Ubuntu LTS 64 bit is great but not as polished as the Mac experience. If you don't mind occasional use of a terminal window and more bugs in general I recommend it. It is very usable for me.