New MacBook: Pro or not?

I’m looking for a new notebook, and it has to be a Mac notebook. I had a MacBook Pro for almost three years now, but I sold it to a friend in Buenos Aires before coming to Canada. I had a 2.16 Core2Duo (64bit) with 4GB of RAM and a 120GB HD, but I’m looking for the new model of the MBP. The thing is, I’m still not decided if the MacBook would be enough or if I should get the Pro.
Both are pretty much the same (if you’re considering the lower MBP, as I am) but there’s still a difference: not just in cost but in performance. One of the worst experiences I had with my old MBP was with its video board. I used it with a 30 inch Dell monitor, and although it had enough power to run trivial tasks on such big monitor (lots of pixels to drive!) when you wanted to see HD video, there were some performance problems.
I guess one of the things I like more about the MacBook is its simple look. But when you think about the difference in price and features you get with the Pro… I’m gonna give it a few more days thought and tell you about my decission.