Over the years I have owned, Psr2100, Tyros 3, S970, S975, Korg Pa800, Pa900, Pa4x. I had the S975 and the Pa4x side by-side, my opinion:

My S975 is not a Genos, but it is a Yamaha, is like a brand-new high-end stereo player. Dancer LIKE the sound.

The Pa4x digs in, not just with great sounds, but with a drive dancer will LOVE, they are not able to resist.

Now who are you? And how will you be using keyboard? – that must come from you, we all hear differently.

If I am not able to get my Kn7000 repaired, there will be a Korg Pa4x in my home very soon.
John C.