I am getting ready to purchase a Macbook Pro from Powermax. I am debating between the 13 inch I7 2.7 Dual Core or the 15 Inch I7 2.0 Quad Core. I am leaning towards the 13inch fora few convenience reason - first is the lower cost, second the portability, I commute into NYC and I like the portability of the machine. The macbook will not be my primary machine, I have a desktop with a 20 inch screen and I5 quad core, running Ubuntu linux and Win 7. What I would like to do is set this machine up to use as digital audio station to write and record music. I would like to be able to record 4-5 tracks (Guitar, Bass, drums and vocals) separately and at times simultaneously. The reason I also want to save some money on the MBP, is because I will need to buy a usb interface that can handle 4-6 analog inputs for recording. If any one has recommendations on what to use as interface to be able to record to the Mac. I expect this to run me at least 300-400 dollars. Any advice would be extremely helpful thank you. Has anyone had success using the 13 inch to record music?