.
I've doing some research on this and in addition to not liking the shape* of the GoPro, and not being ready to cough up that much dough, what I've decided I'm going to get is one of the RD32II cameras. At about $140 the price seems okay, and the quality and features seem about right for what I want it for.
* Usually I don't make a big deal about "aero" but the GoPro is the exact opposite of it, and the idea of having it on top of my helmet along with my helmet light just seems ridiculous. That's one of the things I appreciate about the RD32II, instead of being apparently as wide and tall as possible, it is long-ish and should mount well to the side of a helmet.