Back to a couple of points made by Alec re APC.

When I first bought my 6000 around Nov,1999,
chord changes were slow but this was largely corrected by (I think) V4 - although it's still not as good as previous keyboards owned including the 3000 which was faultless in this respect.

Listen to Frank Bez. All his work is done by single finger chords and is pretty impressive despite that.

Peter