In reply to Aiden Wright: XP or RXP definitely. I have the XP and it is fantastic for all the things you mention above. No experience of the RXP but to me it sounds a bit gimmicky and complicated, and of course it costs more.
it might not be quite what you're looking for, but have a look at the Alpkit Gamma. It's only £15 but it's surprisingly good.
tryfan11 Jan 2010
Aiden , i have been beaten to it ..I was about to reccommend the alpkit gamma, great for night navvin,coloured led's for night map work and only 15 quid delivered (includes batteries!)leaves £65-00 quid for beer
If you are night biking don't not waste £80 on a torch. Get the best you can and that ain't the Gamma. It is a poor competitor to the Myo RXP. In fact it ain't even in the competition.