As much as I love the B3, I, also have mixed memories due to it's bulk and weight, saying nothing of a 122R leslie. I think it insane to do it again when there are so many clones that come pretty close. Yes, I know there is nothing like the real thing(to you). Now, it comes down to a compromise. I am as picky as the next guy, but what I listen to first is the Leslie effect. My old Roland BK-9 and present Hammond SK1 do it very well. If I attach my Ventilator, it is even better, but not by much. My Nord was good in that department also. To me, it is the interaction of the drum and horns ramping up at different speeds.

Aside from the leslie effect, there are the waterfall keys and overall action of the keybed. I would have to settle for somewhat less in that area, as the real B3 takes it, but at what cost, keeping in mind that the overwhelming percent of the audience wouldn't know the difference.