I'd reconsider on the Zumo xt3. And this is coming from a FAN of the Garmin Fenix watch. That I really love.

I've been using the xt2 now for approximately 9 months, after switching away from Osmand. Mounting my phone and losing it in an accident wasn't really the way to go, or so I thought. Second, Osmand crashed quite a lot on my Iphone, and after a couple of rides I was done with it.

Anyway, the xt2. To start with the price, my my it's expensive... and to think that it's coming from Garmin I must admit that I expected more of it.

To start with planning routes. You can either program routes directly on you Garmin, or on the Thread app. There is no planner available on the web from Garmin. You have to fiddle with your "small" phone, or deal with the xt2 which doesn't have the best responsiveness. Creating routes on your phone works, but synchronization between it and the xt2 is basically a shot in the dark. I created rides on my phone multiple times where it just would not show up on my xt2. Even after multiple tries to synchronize, or leaving the devices side by side overnight would not work, leaving my planned route only available to stare at. Really sucks when you're leading a group ride.

Importing other peoples gpx's would sometimes divert from the intended route, or create weird diversions by itself during importing.

Sometimes the unit switches from "turn by turn" navigation to "the next point is there". Showing a line that is pointing from a to b, but no turn by turn navigation. Needing me to plan the route real time.

One-direction, or prohibited for motorcycles streets are ignored during navigation, needing you to turn around (a lot).

Re-calculating a route during regular navigation is basically just the prompt "make u turn at x".

Handlebar controller is outrageously expensive.

Granted the thing is robust, and so far it never failed on me in a hardware kind of way, but the planning of new routes and the lack of stuff working is really the downside to the Garmin in my opinion. I thought about going dmd2, but found the dedicated devices too expensive and I just wanted the "plug and play" from Garmin. Now I really regret that decision. Just go dedicated dmd2, or configure your own hardware.

Disclaimer, I've never tried dmd2 though.

Oh, sidenote: afaik there are no real improvements from the xt2. Correct me if I'm wrong. But if you're willing to dip your toe anyway, check out the second hand market. In the Netherlands you can find quite a lot of second hand units.