The lensatic model is better if you want to use it for triangulation as you can get a good bearing. In the scenario you described the simple baseplate model is most probably preferable. I prefer the baseplate type because map work is much easier with it. I use a Recta baseplate compass I bought more than 10 years ago and it´s still my favorite.
When narrowed to your selection I´d take the GPS model. The scales are a big advantage when your maps also have an UTM grid. I prefer compass models with lines that assist in aligning the capsule and the baseplate with the grid of the map. In many cases this makes taking bearings from the map easier.
Don´t worry about learning the use of the UTM grid. It´s no big deal.
Of course this may be a bit biased but I hope it helps anyway.