Tom,
From what I've heard, Ketron is going to show a replacement for the XD9 keyboard. It will be under $2000.00 but what it will actually have on it I know nothing about.
A replacement for the SD1plus will happen at a later date.
This is just rumor mill stuff right now and let's see if I'm right.
George Kaye
Kaye's Music Scene
Reseda, California