Thanks, friends. From your comments, I have only two questions finally:

1. Is piano sound a lot better on KN65000? I have played PSR2000, and I don't like a lot its piano sound. Really, I think my old and cheap Roland kb(E-36)had a better piano sound. Piano sound is very important for me, to make possible use the kb as a piano.

2. I know that a great advantage of Yamaha is that you may have a lot free styles on the net (I think it is not the same for Technics styles). I know also you may have styles from other manufacturers converted for technics format. But... do Roland or Yamaha converted styles sound as well on KN6500 as on its original kbs?

Cheers

Artaher