I don't know about the 9000's, but I'm using the 2000's sequencer for some serious work, and I've found it to be quite versatile and robust. My only real gripe is that the track arming procedue can get slowed down considerably by XG data "clogs", but that's hardly a major issue. No doubt a PC sequencer may be better in some respects, but this gets the job done well, and there are no compatibility issues, which is not a given when working with Yamaha/XG MIDI.