Thanks Rafael,
I picked up (as in lifted, not bought!) a trek 600 a couple of days and it felt considerably lighter than the Halfway. It also had an extra gear. However, I thought it looked rather staid compared to the Halfway. Right now, if money was no object I would opt for the Gobike, although they're not easy to find.
BTW, what is it exactly that you don't like about the Halfway?
Shilun