I am considering buying a MBP with one of the processors mentioned on this thread title. Using the price of a MBP 2.66 GHz with a 500 GB HD as the basis for comparison, I would have to pay an additional Php 11,490 & Php 28,030 for the 2.8 GHz & 3.06 GHz MBP, respectively, to move from 2.66 to either of the two processors. Are the differences in processing speed of these 3 processors so much that justifies these price differences? I'd appreciate any comments from fellow phil muggers. Thanks in advance.