Hi Zuki,
I’m finding my p121/sx900 a brilliant combination.
I have mine connected via my laptop, so that I can use my p121 as a controller
( of sorts). I hadn’t realised how much I missed playing fully weighted keys till I bought the p121.
Be a good idea if you could actually try an sx before deciding.
You seem to have been very happy with the pa3x.
Personally I haven’t missed my PA3x or even my Pa4x , the Yamaha styles suit what I want to play, much better.
Thought I would miss the style editing functions on the korg, but with a bit of checking round, discovered I can do pretty much the same stuff on the psr , albeit via software.
The best function for me so far , are the sx registrations. Wouldn’t be able to play my p121/sx combo without them.
Really depends on why you want to swap.
_________________________
best wishes
Rikki 🧸
Korg PA5X 88 note
SX900
Band in a Box 2022