Pn-20
I've had the PN-20 for about 1.5 years now and it's a great piece of technology. The screen is a little small and would be nice if it was a little bigger, but I haven’t found it to be a hindrance. I also have the aerial subscription and have uploaded a bunch of aerials into my unit and it's awesome to be able to see where you are at in relation to a real aerial photo. The software that comes with the GPS unit could be more user-friendly and it does takes a while to get the hang of it. But Its great to be able to add waypoints, boundary lines and stand locations with the software and to then to be able to transfer all of that to the gps and be able to see it on an aerial photo on the unit as you are walking around. You can also transfer your waypoints and tracks to your software from your handheld and see them on the map. One other cool feature is the 3d view with the software on the computer. You can really see the topography with the 3d view on.