I love dynamo lights.

I currently have three bikes with dynamos - two SON hubs and an SP. I consider Shimano to be at the bottom of the heap. The hubs power various Bausch and Muller lights; I could not tell you now which ones, but they all seem to give adequate illumination for night riding. I also have Light and Motion 360 Vis helmet lights (largely for visibility) so between the two I am well prepared for just about anything.