I didn't "pass" on anything. And I don't gig out (nobody would pay to listen to me!) so there's nothing to "lug around." If by voicings you mean inversions, I understand those, and I make use of the Bass Inversion function to play them when the score calls for it. I don't have decades of practice and experience. I don't use the bender; I doubt I could accurately emulate an acoustic instrument. I also don't sing or play any other instruments. If my left hand didn't input chords, it wouldn't do anything at all! So no, I'm probably not the target customer for a C.S. That doesn't mean that I think it's a useless feature.

I looked at the manual and it certainly looks like the chord sequencer on the SX900 is very convenient and user-friendly. Maybe the best implementation to date. The point of my first post, is that someone doesn't have to spend $2100 on a new Yamaha to get SOME of the benefits you're touting. (And I agree with you that those benefits could be significant!) If someone wants to jam over stored chord progressions, or even seamlessly select from one of several different progressions in real time, I described how they might do so in a studio setting, by making use of that extra arranger they probably have in the closet. That's all I was trying to say. Peace.