Thanks but I have a GPS logger already. It's from http://ohararp.com and rocks. I clocked it at nearly 90 hours continuous use (recording every second) before I set off on my last trek and since I solar powered it the whole way it never turned off (except when I slept). That's 12 hours a day, 7 days a week for 156 days.

I need the same specs for my next trip and the N810, though I plan to solar charge it there won't be enough power to run it continuously. I'll only be using it to process the data I collect from the dedicated device. Same goes for the camera. 2MP is nice, but canon 7+MP is nicer :-)