I'd agree Technics Organ voices are excellent, but there will come a time when the KN7000 doesn't work or you can't get spares, that's the time to remember your visit to the "Keyboard Cavalcade" and the demonstartions you heard.
It's interesting that you could hear little improvemnet in the Wersi organ demo compared to the Technics. I'd agree though if this the way you hear things then no point in upgrading at the moment.
Kind regards
Peter