Oops, almost forgot, Here are two more IMPORTANT things that NEED to be added to my KN7000 feature wishlist:
1) Improve the style & song sequencer 'timing resolution' big time
I don't know about the KN6500, but the KN5000 only supports 96ppq (parts/quarter note). . . Pitiful at BEST ! Minimum acceptable is 480ppq. The Yamaha PSR2000 supports 1920 ppq. AMAZING!
Some people may think that 96ppq is sufficient but this is simply NOT TRUE, unless you're only into Techno, which thrives on robotic sounding rhtyms.
Timing resolution, second only to the quality of the sound sample itself is the single biggest factor in how realistic a style pattern or song performance will sound. The higher the resolution, the more accurately it will capture the live performance.
2) Improved Vocal Harmonizer
We all know about thi one

, so I won't go into detail.