Love our
Garmin Rino 130's. This system has the ability to talk two-way with other rino users. You can send coordinates between the 130's and later and can even ping the other user to find there location. We keep one while the kids go out exploring and we know where they are and can also call them back for dinner. A big thing that sold me on this one vs some others was it had an electronic compass and I could hit noaa weather when hiking, fishing....... I wanted to get the 530's but decided I didnt need the color TFT
Which ever system you get buy some good topo maps and try
geocaching. Geocaching besides being fun for the family will help you to become proficient in your choice of GPS system. A big thing to remember is when the batteries die you still need to get back so always have a compass handy.