Selecting a GPS device
What features am I supposed to value most?


Really you should decide this yourself.

I would value


longest battery life
simplicity of display
least size/weight
usability with gloves on


The second point is quite important to me. This isn't a device you will use when sitting at leisure at a desk or table sipping a Martini. You probably want to keep your eyes ahead and occasionally glance at the device to pick up key info. A display that crams lots of detail into it will usually be much harder to read at a glance.

For more leisurely perusal you might as well just buy a $50 smartphone and an offline mapping app (ViewRanger is pretty good IMO).