well ill be the first to say that I don't dig the looks. For some reason the concept and TK3 are the only FG bikes I like w/ a fat tube like that. Anyways, as far as riding alum/CF in the city, you'll be fine. I rode an alum/CF road bike around the city for a long time before I got my steel FG, and I never experienced any discomfort. Now that I have ridden steel, I can tell a SLIGHT difference, but only b/c I'm looking for it.

If you're worried about cracks/dents, don't. Unless you do crazy stuff, you'll be fine. But check out the TK3 if you want, it is heavily decaled, though. Leaders are pretty similar, but I think they are really ugly. hmmm..yeah...that's all I got.