Hi. I'm a new mac user, to the point that I know very little about macs other than liking my experience with them. About 3 months ago, I got an ibook for really cheap off a friend. It had been dropped, but worked fine, only the lcd screen needed a new plastic shell because it was coming loose at the hinges. Well, I did a little research into screen replacing and thought I was smooth enough to replace the screen myself. I even got a good deal on a replacement screen, but naturally, I didn't do a good job and it left my ibook to a matter of parts. After many failed attempts at getting a used mac(ebay/local sellers), I decided to save some cash and go for either a refurbished mac from the apple store, or buying a new one altogether. I want to edit video on my mac. I'm really starting out simple with limited editing experience. My price range is about $1500-$1600. I was looking into getting a 13" Macbook Pro. I plan on having at least 4 gigs of ram, but wondered if I'm going to see a huge speed increase between the 2.26 GHZ vs. the 2.53 GHZ?