While debating which of the new 13 inch MacBook Pro's to buy, I am stuck on how significant the increase in processor speeds between the 2.53 and 2.26 Ghz would be. While I am tempted to buy the base model and upgrade the RAM and hard drive myself, I'm still stuck on whether or not I would notice a real difference in these processor speeds. I'll admit, I don't know a lot about how processor speeds alone affect the overall user experience. Conventional wisdom tells me that I really wouldn't notice much of a difference, unless I were a high end user. I'd like to hear others' thoughts on this Thanks in advance.