Hey all! Currently I have a 2007 15" MBP (Santa Rosa) and it's been good to me for the most part. Have had 3 logic board replacements, and a few crappy batteries, but as a whole it's been a work horse and still is pretty dang fast. Only problem is I'm worried about the power I'll need in the last two years of school for me. I'm going to transfer as an MIS (Management Information Systems) major. The things I'm worried about with my current machine are the hard drives full, and the battery is terrible. That coupled with a bit of gadget envy (hi res display, multitouch trackpad, core i5) makes it a tough decision. I know I could do a fresh reinstall of the OS, have my music and movies on an external, and get a new battery to fix these issues, but the idea of having a 7-8 hour battery life with a much bigger HDD to contain all my media content appeals to me. What is everyone's opinion? Should I wait a little longer for something better on the horizon? Or should I take the plunge since its midcycle to have something much better for the last few years?