Lee, you are right about the price, but no arranger ever came close to a quality organ – it is a different animal.
It was the organ that gave birth to the arranger. And the OS is beyond that of an arranger.
I owned a Wersi Delta 500, and a Wersi entry level model that allowed me to take the top off the stand and use as an arranger keyboard. I used it on to play jobs for a while, but it was far too heavy.
John C.