Depends on how you are using it. I've been a full-time pro for 30 years and the 2000 does everything I need.
I never used the sampler on the 9000 or 8000 except to play around with. The on-board memory of the 2000 hold everything I need without having a hard drive.
I have no problem with the harmonizer.
The sound continues after I change it. Yes the keys are light, but I have no problem with that either.
The only input I've missed is the 3rd footswitch, and that's not a really big deal either.
The only way I can make the speakers distort is turn the bass up too high.
Most important--I can carry it under one arm. I don't like the external power supply, but at least it is a new, better design that the old ones.
DonM