RC,
Your analysis is right on. I have a s910 and had a PRS 3000 before that. I've spent the better part of a year trying to get the Yamaha to sound some what like the KN7000. Perhaps in another year I'll get fairly close, however the nightmare that Yamaha calls a sequencer is beyond any hope of saving. The keyboard is easy to move around and many of the styles are very good. The styles I really like I transfer to my true love, the KN7000.
Frank