I have an Edirol PCR-800 that I like a lot. I used it to control the Ketron Midjay when I had one. As I mentioned on PSR Tutorial, I have an M-Audio that is brand new that works fine. I like the Edirol better. You can have the M-Audio if you need one.
I could also control it with Roland E50, but that might be redundant.
With a light-weight controller and the Roland module, you would be looking at a TOTAL weight of 10 or 11 pounds!
Do you still have the E80? I miss mine, but it was just too heavy to carry around.
DonM