I'm in a very similar situation. I'm hoping to get some feedback, and I'm hoping that Levi will respond to my post as well (since his post was very helpful).
Basically, I'm similarly drawn to the MacBook, but still considering the MBP. It isn't a financial decision (I should be able to afford either); it is a practical decision.
I'm starting a new program in the states in September, and I need a new laptop. 95% of the time, I'm going to be using the laptop for the following: e-mail, word processing and printing, MSN, Skype, iTunes, watching movies, surfing the web, and a little bit of photo editing. Every now and then, I play a game on my computer, but very rarely. And, those games which I do play are not graphics intensive (e.g. Galactic Civilizations, the Civ games, turn-based strategy games, etc.). When I want to play "bigger" games, I use my Wii, 360 or DS.
Portability and battery life are also extremely important to me, because I'm going to be lugging this thing around Boston every day. (I'm getting rid of my current 17" desktop replacement because I'm sick of big laptops with crap batteries.)
So, anyway. Because everything I'm planning on doing is pretty low key, and because I need portability, I'm figuring that the MacBook will be more than sufficient.
My plan, as of this moment, is to get the 2.16ghz white MacBook, with an extra gig of ram (2GB in total), and a 120GB HDD.
But, part of me thinks that I should pay the extra $500 for an MBP. Is there any reason for me to do this, or am I just being silly? I don't care about "light sensors". I certainly don't care about larger screens or external displays (since this thing is almost always going to be used on the go). I don't care about FireWire or an ExpressCard slot. And, in truth, I need something with a long-lasting battery and a compact form. The aluminium case would be nice, but it is hardly a deal breaker.
So, the ultimate question is this: considering that I'll be getting 2GB of RAM in the MacBook, is there any remaining reason for me to consider a MBP? If it is going to perform noticeably better in day-to-day operations, then perhaps I should take the slightly bigger machine and worse battery life. But, if I'm not going to notice a different, day-to-day, then I should stick with the MacBook with 2GB of RAM.
Thoughts?