Simon:
Thanks for such a valuable information. The "piano" sound is by far the most important element in deciding which keyboard to own. It's for me. In my humble opinion, the piano sample of the 9K has every other Kb beaten by a mile in brilliance, resonance and all around "harmonics"; I felt as if I was seating in front of the real thing.
By the way, is the Grand Piano sample of the 9K the same as the PSR9000's?.

Regards,
Mario
ps. still waiting for the waver.