Hi,
I think as much as I would love to have an arranger piano, the temptation would always be there to want to upgrade it, to get newer arranger functions. Not as easy to do as upgrading keyboards.

Inclined to think , if I went upmarket from my p121, I’d be inclined to get a clp, rather than a cvp and hook them up via midi. A piano can sound good for years, keyboards get outdated. Neighbours clp was 15 years old, still sounded great.