the extra amount. One last thing, if you are not in a hurry, wait until April to see if we are going to get the Ivy Bridge MBPs or just the mystical new Macbook Pro with the MacBook Air form Factor but that to be discussed later. Sources: http://tech.spotcoolstuff.com/configure-new-apple-macbook-pro http://www.apple.com/ http://en.wikipedia.org/wiki/Main_Page http://buyersguide.macrumors.com/