Not trying to tell anyone what is BEST... just offering up alternatives, chas.

IMO, you already have what's BEST at a Hammond clone. The KeyB mkIII sounds incredible. But it is no more what the OP talked about than a BK-9. And a hell of a lot more expensive!

Basically, the Numa Organ costs about the same as a BK-9. So consider it (the BK-9) as a clonewheel sim keyboard, that throws in an amazing arranger FOR FREE!

Not too shabby...