Neil,

Technote use to carry the SX6 and I think they still do, and it comes completely set up and ready to go. I bought mine from them when they had a half-price sale a couple of years ago. I, too, have a KN6500. It is really great having the hard drive. I have backing tracks to about 900 songs on it. It's very easy to use and I doubt that there is any way I could possibly fill it up.

Peter