The Petzel Myo series is stupid and $$. Don't buy it. The Gemini by Black Diamond is cheaper, lighter, longer burn time, one less battery. The Myo is slightly brighter in LED mode, and with similar bulbs, the halogens are equally bright (the gemini come with a less bright one attached, w/the brighter one as a spare).
After exhaustive research I claim the tikka to be the best lamp for anything but night climbing/route finding. and the gemini the lamp to bring when you'll be fighting for the bivy/car in the darkness.