Hello all. I've been waiting patiently for an upgrade to the uMBs and now that it's finally come I'm not sure what to do. I've searched around the forums and sorta got an answer to this question but I still want to know more. How much difference does .27GHz make in terms of speed? I've heard that basic users won't be able to notice the difference between the two but there has to be some performance increase with a faster processor...no? If one cannot tell the difference doing basic tasks such as word processing, iTunes, bowsing, etc., where can the difference be seen? Are there any processes where a significant difference is noticeable? Also, in terms of resale value, does anyone expect that the 2.53 model will be able to be sold at a substanially ($100+) higher price? I'm very curious because upgrading the 2.26 to a 500GB hardrive and 4GB of RAM comes out to be relatively cheap and I would do it in an instant if the difference is truely that minimal. On the other hand, if the extra .27GHz will allow me to stay up to snuff with future technological advancements I'd consider the extra money to be a worthwhile investment. Any help would be greatly appreciated and would go a long way in helping me come to a decision. Thanks.