MacBook vs. MacBook Pro

I'm considering my next computer. I've already decided on a Mac, but am having difficulty choosing between a MacBook and a MacBook Pro. For those not in the know, I generally use my computer for the following:

- internet (email, blogging, streaming video)
- DVD watching
- iTunes
- Microsoft Word, Excel, etc.

I'm a light to moderate user (I think), but I do tend to watch a lot of video content (Netflix, Hulu, DVDs) and get really annoyed when things take forever to load.

Any opinions here?