So tomorrow I take the leap and ditch Windows. I'll be getting a Macbook Pro, Logic Studio, and an Apogee Duet to replace my current home system. My question is this: I am really torn between the 2.4 and the 2.53 but how big a difference in performance will I see? Is it worth the extra $300? I know the L2 cache is doubled, but is that really a $300 jump? Thanks everyone!