There are numerous models in the Montana range, namely:
- Montana 610
- Montana 620
- Montana 700
- Montana 700i
- Montana 750i
Garmin Montana GPSr units are top of the line in features and in price. They have a touch screen, are waterproof (IPX7) and the higher end units have inReach messaging, which allows text messages to be send via Garmin’s subscription service from anywhere with satellite coverage. They could almost be called overkill for geocaching alone, but there’s no problem with over-compensating once in a while.
A comparison chart can be found here