Mike, I bought a Motif 6 Classic at a good price from Bluezplayer on this forum who was upgrading to the Motif ES. Because I was only interested in a keyboard for live use the polyphony wasn't as much of a concern to me as someone who was looking to produce complete arrangements on the Motif. Though am I thinking about adding some plugin boards to expand the sound palette. I just couldn't justify spending an extra $1000 for the ES features even though I was tempted to.