Ian, I agree on the Roland weighted piano comparison having used an RD300SX and the RD700SX, although I haven't tried the latest with the ivory feel keys. Everyone raves about them, but way too expensive.
No, the KX8 might just fill the space, that I was missing. As you are a piano player I take good notice of your comments.
Now to try and talk my dealer into getting one into stock for display

Cheers
Dennis