1.83 - Great price and good for basic needs. I think it is the best deal in the 3 MacBooks. I recommend you upgrade the RAM for all 3.
2.0 - I doubt that anyone can see the performence increase a lot. Good only if you want to burn DVDs.
Black 2.0 - Only go for this if you want to show it off. The 80 GB HD is merely $50 more, so basicly you are paying $150 for the black color. Although I have noticed the Black models are not as hot when I visit the Apple Store, and no discoloration problems.
I think the Macbook you described (1-2GB, 2Ghz, 100GB HD) sounds good. No one has mentioned a MBP probably because it doesn't seem like you're going to be doing enough stuff to really warrant the extra money being spent on a MBP. If you think it'd be a better choice though, then get it.