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I have a garmin 120.
I would suggest Garmin.Easy to use and many to choose from. I have a couple Garmin Rinos and I use mine mostly for scouting.I think they are the best thing for learning new areas. We a couple laptops with receivers to track out progress in real time. I mark everything that may be interesting and then go over it at home to clean up and remove items that I won't need.
The Garmin 60 Csx is great because it can get signal under trees, in a car or boat. The other units like the etrex can't.