It seems to me that very proficient players like Chick Corea, Rick Wakeman, Keith Emerson, etc., would have no reason to use an arranger keyboard. When they play solo piano, it's so good that you don't miss any kind of accompaniment. A player at that level just doesn't need the arranger kybrd. The arranger keyboards are great for playing at the local level but I've never seen a national act, (particularly jazz), using them unless I'm not watching the right groups. Later, Ray