Love the SX-900. It's just a fun keyboard.

Like Stephen, I too wish the Parameter Lock could be expanded, especially locking in the assignable control knobs. Not crazy about the new style setup. No separate Country or Ballad Style category is hard to get use to.

My last Yamaha arranger was the PSR-3000 so the SX-900 is a major step up, just a little different, and I'm so glad it's here during this "lock down"

I still like mine, but would like a gently used Genos more!

Yes the lock in freeze mode but I would prefer it being a parameter lock. There are work arounds but it would make things a bit easier.

I didn't like it well enough to keep it. I may have kept the Genos, if it was not so wide. Still I prefer the PA4X to either of them. I did like the keys on both the Yammys though.
Still hated the vocal processing/harmonizer.
I like the way the Korg makes my voice sound.
Still, there are no wrong choices...all the modern arrangers are fantastic!