Hello, I am going to college this fall and am looking to buy either a 2.4ghz or 2.66ghz macbook pro. My initial question is, it seems in years past that apple has waited to update its computers until after the back to school promo. Do you think this year will be any different? If so, I will probably order the computer right away. My second question is, for an engineering major, do you think a 2.4ghz with 256mb vram will suit my needs or would you suggest upgrading to the 2.66ghz with 512mb vram. I guess the real question is, how much of a difference in performance will I notice if I opt for the more expensive unit. Thank You for your help.