Ok I'll out myself, I'm a gadget freak lol.
I have been looking at GPS units for the bike, (I already have/use a foretrex but I would like to dispense with dragging paper maps around for some of the less adventurous routes).
The bike specific Edge is out, firstly because it uses rechargeable internal batteries with apparently a ten hour life, no use for more than a day or two's camping.
Also I already have a bike computer so all the cadence/hr/speed etc is superfluous.
I am considering the Garmin GMap 60 CSx but apparently it wont use OSGB mapping which is a worry as some commentators have said that the Garmin terrain map available has limited coverage.(though someone mentioned using memorymap with it?)
Thoughts from those in the know? For openers, I want AA type replaceable batteries, useability off the bike (car etc as well is useful), waterproof, robust, OS mapping ideally, handlebar mount nice but not critical. (don't want much do I lol)