Back when I was playing every night of the week and never had to tear down, for a while I used a second keyboard, a Casio WK3200 I think, strictly to have the piano and/or organ available at all time. It has really great organ and piano sounds. I had a strip of duct tape over the name, and so many people asked what kind of synth it was!
I later gave it to a friend and he still uses it for the same thing going on five or six years now.