I am trying to decide between a 13'' 2.4 and 2.66GHz mbp. Not that it matters, but this will be my first mac. I will be using this for school and leisure, IE heavy multitasking with web surfing, word processing, powerpointing, email, watching videos, itunes etc. I initially was thinking the 2.4 model, but most friends are recommending the 2.66, based on my telling them I tend to have multiple programs and web windows open at once. What do you think? Thanks in advance. PS, Since i use an external HD, HDD space is not an issue.