I've been holding out since summer and now that the new Macbooks are here I'm finally going to be getting one. However, I can't decide between the two options. I get the edu discount, but am not sure if the $250 difference is worth buying the more expensive one. How much would a bump of .4ghz mean in terms of the speed of the computer? I don't do any video editing or anything and normally will only have 5 or 6 applications running at a time. Thank you so much!