It was never the sound of the Ketron products that I hated - it was the poor handling of polyphony and the way the harmonizer was linked to the polyphony that made me go bald ! (well, not really.... )
I can't use a kb that shuts the harmonies off when the polyphonic limit is reached. That is unacceptable in my shows. I need to be in control of every aspect of my vocals. The drums are a close second place, but the voice runs the show.