Choosing GPS device by function

Hi,
I currently have basic Bryton Rider 40 which works fine for me. I'm thinking of upgrading at some point and I quite like the bluetooth alerting functions on devices like the new Lezyne computers - and the instant uploads of these and the new Garmins/Brytons.
I'm only partially interested in mapping but one thing I think I would like, but don't know how readily available it is, is the mapping display of the road ahead when not in a route-following mode. Say you're on a long winding decent, a quick idea on the path of the road head could be useful.
Is this sort of thing dynamic enough on the mapping computers? Or are they a bit stop/start in presenting the position on a map?
Any thoughts welcome.
Cheers
I currently have basic Bryton Rider 40 which works fine for me. I'm thinking of upgrading at some point and I quite like the bluetooth alerting functions on devices like the new Lezyne computers - and the instant uploads of these and the new Garmins/Brytons.
I'm only partially interested in mapping but one thing I think I would like, but don't know how readily available it is, is the mapping display of the road ahead when not in a route-following mode. Say you're on a long winding decent, a quick idea on the path of the road head could be useful.
Is this sort of thing dynamic enough on the mapping computers? Or are they a bit stop/start in presenting the position on a map?
Any thoughts welcome.
Cheers
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Cheers - which device is that? And does it display the map, even when not following a route?
I generally have it show distance, speed and heartrate. I still get the zoomed in map / directions at junctions.