Is there going to be a noticeable difference between the 2 cpus? I already have a 320GB 7200 RPM drive to put in. I was thinking to just order the 2.26 version and upgrade to 4GB ram ($90 from apple). Seeing as both models have the backlit keyboard and everything else is basically the same. So essentially i need to decide is $210 ($300 - 90 for ram) is worth it just for the cpu. EDIT: Anyone know if the hard drive is as easy to change as the previous unibody. Not sure now with no removable battery.