Are Dahons a good choice if you want a bike you can upgrade over time? I am new to the world of folding bikes. I am looking for a "go-face" option; a bike that can mimic my road bike, but is easy to transport in the truck of a car. The price for the option I think would be a match for me are behind what I can pay right now; My thought was to get a folding bike with a good quality frame and upgrade components if I want to later. Is there a model or models in the Dahon that may be better for future upgrade?