I have the L&M Arc MiMh and I think it is an excellent light. I use it for early morning rides also and find the hardest thing to adjust to is the "tunnel vision" effect of riding with the light directly in front of me, while everything else is dark.

The Arc emits a tremendous of light from such a small unit, and I think the length of the beam is long enough for 20-25 mph rides. I haven't hit 30mph with it so I can't comment on that. The spread is good for the roads I ride on also. I wouldn't hesitate at all if you can get one at at your lbs for the 359 price.

Good luck.