I want to buy soon, and I am wondering about the differences between the 15 and 17 inch MBP's. I plan on upgrading the processor, firstly, and with both computers the starting specs are identical, and the processors can also be upgraded identically, to my understanding. Next, if I were to get the 15" I could get a 250GB HDD at 7200rpm for around $50 less on the bottom line as opposed to getting a 360gb HDD at standard RPM or at 7200 for about $140 in the 17" MBP. I feel that 250GB is probably enough for me, considering that I have a 500GB external HDD as well, and will likely use it for a lot of storage (of video/audio files). Ultimately, I want something that's going to be awesome, portable (like a laptop should be) and powerful. I want something that's going to look good, and be easy and fun to work on. I know there is also a debate going on here about the glossy/matte(anti-glare) finish, and I know that the CHOICE for that only comes with 17" MBPs. I feel myself leaning towards the glossy finish, but again, opinions are welcome here on that as well. The bottom line here is that the 15" MBP would cost me between $300 and $400 LESS than a 17" MBP. I want to know if the differences (if there REALLY are that many, other than 2 inches, and a 'built in 8 hour battery') are really enough to justify the jump to 17" given that I can get the same specs (minus the HDD size) for much less? opinions?