For the last 3 seasons, I've used a mid-quality Android tablet (7") with actual GPS chip (GPS receiver & Russian standard GLONASS) as my swiss army knife travelling device.At home, I plan quite detailed, long distance routes using multiple layers, waypoints, and line segments in GoogleMaps, then export as a .KML file. That file can be converted on a legitimate/free website here (
https://www.gpsvisualizer.com/convert_input) to a .GPX modern GPS data format. There are a number of decent GPS map apps in both the Android and Apple technology spaces; so far, my choice remains OSMand (
https://osmand.net/).
Tablets like these offer Bluetooth 4.0, connecting seamlessly with my old Sena SMH-10s for turn by turn directions, and this gives me GBytes of storage for playback of MP3 tunes for those long stretches across the plains...
When I get to a hotel at the end of ride day, I also have a travelling computer for Internet searches etc, and I can catch up on emails/social media, then push the day's pics up to a cloud service storage - instead of carrying it with me to the end of the trip and doing it at home.
Have it wrapped in an inexpensive, but high quality neoprene skin to prevent most damage from falls, and locked into a RAM universal cradle mounted to my tank bag at an angle with home-fabricated aluminum bracket. Have been caught in day-long rain on many trips the last couple years, and I am amazed at no water intrusion problems yet.
Now in 2017, I can't believe that there remains much of a market for overpriced, special-purpose bike GPS units. I'm not saying they were poorly made, but tiny displays, limited additional features and connectivity challenges make me think they have to be going the way of the Do-Do bird very soon.
All in, I think my total replacement cost for this GPS solution would be well under $250 for you USA folks.
Good luck in your quest.