If you buy from the Apple site through:

http://evreward.com/store/go/178-apple-store you get a bit of a rebate, which all adds up.

If going through Amazon you don't have to pay taxes (I think) which is a nice savings. And of course, free shipping. Although, you can't customize your Mac if you want to, so that's a bit of a drawback. Also, not sure if they offer the Apple Protecion Plan.

Now I have to decide what to do. Ack!