@PatrickM Thanks for reaching out!
In terms of GPS watches that also play music, you have a couple of options that fit the bill for your son:
- Garmin Forerunner 245 Music GPS Watch.
- Garmin Vivoactive 4 GPS Smartwatch.
- Garmin Vivoactive 3 Music. (Not carried by REI).
Those watches will come with access to the Garmin Connect IQ app store, which should give you different options in terms of maps and fitness tracking. You'll also want to look at music compatibility to make sure your chosen platform is supported by one of those watches.
Are you also looking for a GPS watch for your use in the backcountry? If the music capability is a must then a watch is likely the best way to go. Here are a few options:
- Garmin fenix 6 Sapphire Multisport GPS Watch.
- Garmin tactix Delta Solar GPS Watch.
- Garmin Forerunner 645 Music GPS Watch. Less of a true 'backcountry' gps watch and more designed for running and fitness.
Additionally, take a look at this list of all of the available Garmin GPS watches that feature music on them. None of these watches require a separate data plan, most will sync with your phone via bluetooth and update on your home's wifi when you are charging them. They connect to GPS satellites outside of your home via a small antennae in the watch, independent of the wifi connection. Depending on which music service you use, you should be able to sync with your phone to upload your music to your watch.
In terms of using one watch between you and your son, the watches that were recommended for your son are not true 'backcountry' GPS watches and more focused on GPS features that track your speed, direction, and elevation for fitness or training.
Hopefully this helps, thanks!