Was really pleasurable, also wistful, taking my son to try them out. We could just hang out in this large room in a retail store in the middle of NYC for a few hours, he just playing whatever was there. Sometimes other kids would drop in too. That kind of relaxed vibe now incredibly rare.
And though I can hear and feel the music, I can't make it, never learned. Don't have time and space to do it now. Really glad he is getting it into his brain at a young age.
You could go Kawai VPC-1 which is just the controller, and then connect it via MIDI to whatever you like. That way, you get a wooden action without paying for the sound engine (I've got my VCP-1 connected to a CP Reface):
I looked up the VPC-1 and while I probably would pay a bit more just to have speakers and a sound engine - the weight difference is interesting. It's 29.5kg for the VPC-1 vs. 17.0kg for the ES920!
My absolute favourite is the Nord Grand, but it's a little too expensive.