Yes I am a guitarist. I used to play keys a bit 15-20 years ago. I loved the piano.
Now I just need something to input MIDI. 61 keys used to be the smallest I'd go but, now a 49 might be all I need.
I'll check out the links and what you're using and get back. I don't think I'll need a lot of programmable faders and knobs, but who knows. It's been so long I forgot what a pleasure it was to control things from a keyboard.
Besides a Yamaha PSR, I used a Roland 88 Electric Piano, Roland 61 key Synth and I started with a Yamaha DX7. Those were the days. I took out a loan ($) to buy my DX7. It was a big deal 25 years ago.

Thanks, Wayne