In reply to Carless:
Myo RXP is really good, and the 2015 version seems substantially more powerful than the previous as well. My only gripe is that the button is small and difficult with gloves on. The diffuser idea, rather than separate LEDs, for wide or focused beams is great as well.
I also really like the Icon from BD though. Button is much easier to use with gloves, but it is heavier and you need to click between LEDs for a concentrated or diffuse beam.
Red LED option is a bit of a un-necessary extra. It is good for avoiding spoiling your night vision, but you can't really navigate by it as the red light makes all contours disappear (on OS maps anyway).
Not a great fan of the Fenix HP20 - it's got a really bright, but really concentrated beam. Great for distance and for searches, but poor for close up illumination and the concentration of the beam makes for bad glare from map cases etc.
Cheers,
Stuart