Hi;
You express the same feelings I had until I actually got the Kn7000 and started using it.
You will end up throwing away most of what you have done in the KN2000 and KN1000.
The Kn7000 is phenominal -and the stuff from the KN1000 and even the KN2000 is not necessary.
With the KN2000 the level of my playing was barely acceptable - so I mostly used pre-recorded stuff like General Midis I made conversions of.
With the KN7000 - the level of my live playing is better than my old General Midi files.
I make my own custom rhythms and they do exactly what I want them to do.
Dont even think about it - Get it - you'll love it.
Jerry