I'm going to buy a new 15" MBP this week. The BTO option of 2.6ghz is an extra $250. Is it just me, or does $250 for an extra 0.1ghz seem slightly high? The computer will be mainly used for crunching scientific data for my thesis as well as common productivity tasks (word/powerpoint/filemaker pro) and some light video and photo editing. For the data crunching it's always better to have a little bit more processing power, but is $250 for an extra 0.1ghz really worth it? I feel like it's so negligible I won't even notice it. anybody have any evidence in the form of benchmarks or similar tests that I could take a look at?