Thanks for all the suggestions so far.
if you plan on doing any winter riding, it might be worthwhile to look for a internal geared hub model.
I haven't thought of that. Do you know which models have those? How long would I have to ride in near-freezing weather for it to make a difference, and how much extra would it cost for an internal geared hub model? I'm not that knowledgeable with the technical aspects of biking. =]
I was looking at the Downtubes as well, particularly the 9FS, although I'm still leaning towards the Dahons.