As far as lighting up my path, I really enjoyed an XML zoom light in combination with a Wide Angle Lens. You have an adjustable rectangle of light in front of you without having to blind everyone else. It cuts maybe 10% off of the light output, but it was probably as good as a purpose built cycling light but at a fraction of the price. Specifically, I had this lens cut to fit over the front of this light. That is until I dropped it and broke the light. I just taped it on with some thin strips of clear tape. With the 5 mode light, I could still use strobe during the day for visibility too.
For a handlebar mount, I just bought a cheap light from Amazon that included a mount. Then, attach the mount to my bars and hang the light beneath so gravity works in your favor to keep the light level.
Good luck.
John
Edit: I had been meaning to post this somewhere so others could benefit. Here are some beamshots of what I described above. The pics are actually from a ZB006 since my other zoomie broke.
Full Zoom
Full Zoom with Wide Angle Lens
~75% Zoom.
~75% Zoom with Wide Angle Lens. (about what I use while riding after dark)
0% Zoom for reference.