The felt is fine on the road-- my GF has an old TK2 (about like the TK3, now) and has ridden it a ton on the road, including a lot of serious climbing and some fire roads. She's been pretty happy with it-- toe overlap has never been an issue.

The street langsters are a step below the other two anyway, regardless of geometry. The langster pro is pretty nice- I rode one for a couple years. And you'd have to change the bars and the crank's probably not a 144, so it will end up costing as much or more than the other two for not as nice of a bike.