I second the choices of Bill in another sequence:
1. The (overall) sound; many very good sounds and 4 extra soundboards applicable.
2. The SD-Card facility which loads quick and presents the possibilty of using audio.
3. The USB port to link directly to your favourite audio recording program on PC.
For sequencing, the KN7000 offers the same good sequencer you have in the KN6000. So why wouldn't you try it with better sounds?