I use the Garmin M5 Pocket PC for my Exbal program. I got a refurbished unit on E-bay for about $350. It's overkill for running the simple exbal program but it has GPS so it doubles as my GPS unit. For 3D mapping you need to buy National Geographic maps (others available). $100 clams per state (overpriced). It's a kind of a cool toy I guess. You can view a map of your hunting area, hit a button that says, Show my current position on the map, and a dot shows up on the map so you can tell where you are with relation to other areas on the map. Also it leaves a bread crumb trail showing where you have been. Down side, you can't save the bread crumb trail to a PC and the trail disappears when you turn the unit off. Other negatives are, its not waterproof, more fragile then a Garmin 60csx, and the integral battery runs for 5 hours if on continuously. I have a $9 dollar backup battery unit which is powered by 4 AA's. Also comes with vehicle charger and audio unit for car.
Other pluses, I use it to find addresses on the street. Punch in address and it routes you to your destination, voice comes on and tells you to get ready to turn within the next 100 yards. Kind of like the GM on star units. This mapping software comes with the unit and covers the lower 48 .
Also stores music & plays music (kind of Nice to listen to some Johnny Cash when your going stir crazy in your little spike tent in the middle of nowhere), has word for taking notes, Calendar etc. (all the microsoft stuff & links/updates with your home PC).
The screen is a bit larger then a regular GPS, but its hard to read in glaring sunlight.
It's a lot more than you need for running an Exbal program and may or may not be for you. Check it out. For the price that I got mine for, I'm happy with it.
Regards,
Vic