I'd suggest that you skip the GPS watch if it's for backpacking purposes. Unless you need one for training (biking, swimming, running) and only occasionally will be using it as a backpacking GPS, I'd recommend getting a GPS that has batteries that can be changed.
You specifically mentioned you like to keep a track log which means the GPS watch would have to be on all the time you are moving. That will burn out most GPS watch batteries in a day and you will have to carry a charger of some sort.
I'd recommend looking at the Garmin Foretrex 301 or 401. It can be worn as a watch (supposedly… I never would), but it's a very good non-mapping GPS with a good battery life and weighs about the same as most of the GPS watches. The watch strap is very clunky but easily replaced with something lighter.