The PowerJazz's lack of proportional braking put me off big time and I want to avoid mech brakes. It also lacks a "car mode" that the other Jazzes have - I think cogging might be a problem with it. It's also pretty big and heavy.

Kontronik are rumoured to be working on a Jazz in between the 55-10-32 and PowerJazz. With some luck it will have car support...