I'd really like to save a few hundred dollars on tax, and was wondering how long it usually takes Amazon to receive stock after Apple starts selling. Has it been consistent in the past? I'll probably just bite the bullet if it takes several weeks, as I've been using an iPad as my main "computer" for far too long. Also, is there a major difference between the 640M and 650M? I'd like to try Skyrim in bootcamp, but as I don't play many games I'm not sure if the price increase is really worth it.