I've had a Petzl Duo for a few years and I changed the "low beam" to a 5 LED unit last summer. You can buy this as a factory setup also. I like this unit a lot. The LEDs are bright enough to do anything around camp, in the basement, or under the hood of the car. The Leds will still be operating ,long after I run the thing over or lose it, and they cast a very pleasing smooth and wide beam pattern. The halogen High beam is quite bright and focusable. It can light quite a distance down the trail when night hiking. . There is a spare halogen bulb stored in the head. A big thing for me is that it operates on AA batteries- I only carry AA batteries so everything is easier. The switch and zoom controls are easy to operate and the switch has a lock, so the thing won't get switched on in your glovebox or rucksack. Long story short I thing the Petzl is worth the money.
I am not addicted to geocaching, really.