Hey folks for what its worth....I have had lots of keyboards and organs too,,,,Back in 1980's the Yamaha HS series had really nice keybeds, so Yamaha has been doing this for a while. I have had Korg, Kurzweil, Yamaha (T2) and some MIDI kbds along the way.
Before the SX-900 came along the MAIN reason I would not buy a PSR was the lack of a quality keybed. I am happy now as I think the SX-900 keybed is really nice. Very useable and very quiet and solid. Yeah to Yamaha for doing this!. And the sound of the SX 900 is really top notch. So for now I am very happy, some day IF my playing is warranted I may get a Genos...I like aftertouch for Orchestral voices and 76 keys is very nice, along with even better sound.
Lee