My baseline is map, compass, and a ForeTrex 401. But it is nice to know that for the weight it costs me, my Android phone offers a pretty good backup GPS and compass. Before a trip, I do take the time to load a copy of the same waypoints as my 401 into my phone. Most of the simpler smartphone GPS apps can 'goto' a waypoint. All I really need is a UTM grid coordinate anyway.

I am getting ready to upgrade from a Droid 2 to a Droid Razr MAXX, which gives a phenomenal amount of runtime for about the same overall weight. Not that I would run it continually anyway, but still. And it is one of the newer designs with the gorilla glass, kevlar backplate, and stainless steel frame. Not bad since I feel it's important to tote a cellphone anyway.