This season, the folks in a 5:30AM popular local ride are very keen on the Exposure Diablo headlight. 1100 lumens, ~1.5 hours on the high setting, sells for $300 laround here. One of the guys also mentioned that the flashing mode is really nice -- still good enough to see the road ahead. Dawn is close to 7AM around here, this time of the year, so a good light is essential in early morning ride.