I have a Hammond B-3 and really don't like carting it around for non-Organ Trio gigs. I've played with NI B4 II but frankly, it's miles off the real thing - especially the Leslie sim.
I want a post-'64 B-3 (Mylar caps) VI with a 122 Leslie sim that actually sounds authentic. Clavia have just about done it in the hardware domain with their Nord C1 Combo Organ - so it's obviously possible using software.
If it's really good, I'd happily pay up to $500 for it.
First person to come up with the goods gets my dosh.