In reply to mike123: What did you buy?
I was out on night nav exercise last-night and reckon the Petzl Myo RXP wins hands-down! The wide filter works really well, not only for a walking/working area but for reducing glare when looking at the map etc. It also seemed to have the longest spot beam.
One of the reasons I went for it was the overhead strap, and I like the battery pack on the back. Speaking of which, the batteries are lasting really well in it. I have it programmed to come on at the lowest setting first, and then scroll up through to the highest, as this saves battery and also saves you blinding your tent mate when you only need 15 lumens!.
Very pleased with mine anyway