Alistair,Anyone moved from a F800gs to a CB500X? . . . . .
I bought a CB5X new at the beginning of 2020 whilst still owning a F8GS. It was to be the replacement for my 600 Transalp (I'm planning on NEVER being without a F8GS). I put over 6k miles on the CB and formed the opinion that it would never be a replacement for the Transalp. For me, the CB lacked "feel", being "souless" when compared with the Transalp and even when compared with the F8GS. That combined with its lack of ground clearance (standard machine, no Rally Raid add ons) led to me selling it in June of 2021.
The F8GS does everthing that I want from a dual purpose machine, as does the Transalp and the 4 x XRV750s I had in the past. But, and I know this'll draw comment, I consider the F8GS to be better in all departments when compared to the older Hondas and obviously way better than the flabby R1200 bikes .
If you must scratch the CB5X itch, try and get a Rally Raid upgraded suspension machine. It'll fit you way better than the standard bike, even the latest 19" front wheel versions.
Just my tuppence worth.
SteveT