I have extensive experience with the Garmin 60csx and 62st, and I really like them both. I have been playing with the Delorme Pn-60w and I like the maps, the screen is easy to see in direct sunlight and the interface is very much like the Garmins that I am used to. I think that as long as you get the features you want, you find the one with the form factor and interface you like. They all rely on the same satellite constellation. The newer ones have a very good, more sensitive, sensor.