Bernie,
I understand when something just doesn't play or sound right to fit one's needs. You are obviously looking for a particular sound. Might I add that often a sound goes with a particular keyfeel. Get those two together and you'll have your winning organ sound. For me software is not the way to go live. You may have different experiences, but a keyboard that has the B3 stuff already going for it would be my route. - What about a Korg CX3? I heard Larry Goldings play one at the James Taylor concert and it certainly sounded authentic.