2,000 lumens is a HUGE light. I don't think you need that much light, certainly not on the road.

My personal favorite light is the Cateye Volt 800:
1. A true 800 lumens, plenty bright
2. Very reliable
3. Reasonably long battery life and the battery is modular and swappable on the road. You can buy another OEM battery for ~$50.
4. Industry leading mount: 100% stable, easy to use and tough
5. Good beam pattern
6. Warm light color
7. Some light directed to the side for visibility