Hi Donny,
not instead of the sx, but certainly wouldn’t rule out a new model Korg pa ? in addition to the sx.

I’ve always had a psr,( even if not the latest model) in addition to a Korg.

I sold th Korg pa3x and Pa4x, but I held onto the ec5 pedal ( which I’ve had for about 30 years, it went with my Korg i2, ) plus I held onto my Paas speaker system , just in case. Haha.

Had been considering a new Clavinova , but, think I came to my senses, starting completely over and learning solo piano again, ( instead of keyboards) maybe too hard, not that many years left , haha, Whereas keyboard in conjunction with my p121, that is achievable.