Thanks George. I appreciate your answer!
-What do you mean with "the WK is the only keyboard that can show music on the screen, not just lyrics"? You can follow the notes and chords on the display on the WK, but you see this also on the PSR9000, isn't it?
-You say that the styles on the GEM WK6 are better than on the PSR9000. This is my point of interest. Can you tell something more about this?

Thanks a lot!
Steve