First off this forum has been very helpful in answering many questions i've had about my current macbook, thank you very much. Now down to the question, i am going back to school for mechanical engineering and need help upgrading my current laptop. I'm not a very "techy" person but i've been doing my research. I have a refurbished macbook(4 years old i think) that has been a complete joy for photography and everyday use. I'm going to be running programs such as matlab, solidworks, and cs4. I've been looking at the 15" 2.4GHz and the 2.66GHz models (since the 2.53GHz doesn't seem to be worth the increase in price over the base model). It appears that i will need to run bootcamp for most of the programs, however i'm worried the I5 processor won't be fast enough for my needs. Budget is reasonably flexible, however it'll be tapping into beer/book funds. Any help would be greatly appreciated.