Thanks, everyone, for all the good info. The Nexus 3N80 seems like a good value. But 3W too bright? I run 11 watts of LED's now--tightly focused; blinding if you look right at it, but not spilling enough to seriously bother cars. I am thinking of setting up two 3W leds with the Nexus, using one or both as a high/low package.

I am less convinced, but still open-minded, about an IGH in the back. I may try it out on my commuter first. I'm itching to get building on the brevet bike, but taking time to look at all options. The only decision so far--chrome.