Honestly, save yourself $200 and put it towards something else like a laptop case, or a laptop stand, or bluetooth mouse and keyboard. With tax, the Macbook is $1100 and the MBP is $1300. I doubt you'd get any serious use out of the Firewire port, and while the backlit keyboard is nice, it's up to you as to whether or not you'll truly need it. Or.. if you're really vain and don't like white and would rather have an aluminum body, that's your choice too.
Personally speaking, if i had to do it over again, I'd get the MacBook instead of the MBP if I was going to get the 13". But next time, I'm staying away from anything with a glossy screen and like 15" more than 13" anyway. Also remember, if you want/need more memory you can get it a lot cheaper from Newegg than from Apple.
Doug