Got to confess, if I want the full organ experience, nothing other than a double manual unit and pedals is going to suffice.
The minute you decide to go to a single manual sim, all bets are off. It's close to impossible to set up a second MIDI keyboard under the sim close enough to give the proper dual manual experience you get with any proper organ, a full set of pedals will cost more than the Numa itself, and a Leslie sim won't come CLOSE to making you think you are playing the real thing...
At this point, probably time to start being realistic!
Mockie has got the same gear as me (plus the MIDI accordion, I've only got two non-MIDI ones!), but none of it has Hammond stuff even close to the BK-9. The Hammond sim is possible the MOST improved section of the BK-9 over the G70. It's possible, if the G70's HB section were as good as the BK-9's, he wouldn't be asking this question in the first place.
All I'm doing is trying to be practical. But it's no skin off my nose no matter WHAT Mockie ends up doing. I hope he enjoys whatever he gets.
He MIGHT also want to take a look at the KeyB Expander, and MIDI it to his G70 or MIDI Accordion... Mind you, I am reading quite a bit about distribution and production problems for them. I hope those are sorted out by now (or less over in Ireland).
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An arranger is just a tool. What matters is what you build with it..!