I try to set up all my bikes with similar positions - in terms of saddle to bar drop, saddle to bar reach, and saddle height. Some will have more drop but they are all within a 3" range, roughly. (E.g. my mountain bike has the same drop from saddle to the bar, as my average road bike has from saddle to bar tops.) My theory is that I'm used to a certain body position, especially hip angle, and will do better if I stay in that position.

I like B17s a lot but only have them on two bikes. They are expensive, heavy, don't like rain (a real issue where I live), and don't like being crashed (on a mountain bike, for instance).