I'm pretty happy with my MagicShine BJ808 (rated at 900 lumen but in reality probably lower). I find that it illuminates enough ahead of me especially on a descent or at speed. Very easy to adjust both angle and intensity. Apparently it has a strobe feature that I have yet to be able to find how to use. The beam is definitely brighter than a lot of headlights but not blinding to drivers providing that you're not aiming it up. The colored light indicator in the rear also shows you battery life. Battery life has been very respectable at this point. I'm always looking for the best value and at around $85, it was cheaper than my Niterider lights when I originally bought them. I can't address durability at this point (too new).

I had upgraded from my Niterider Sol headlight (rated at 115 lumens) that I had been using for a little over 4 years. This will probably become my helmet light since it still does a pretty good job and holds a very decent charge. Currently using the Super Flash blinky. Seems to do it's job.