I own three ones and I don't speak about others ... that I don't own !
I have B5 from acoustic sample, Blue3 from GG audio and vintage organs from Native I. Considering the sounds, I clearly prefer the B5 and the Blue 3... These two organs are very nice. Considering the playability, the three ones are good too but GUI of Vintage Organs is too small (Small area reserved in Kontakt !) not very easy to use. I suggest you to test B5 and Blue3 which normally will cover all your requirements and the two organs are very well featured with a big and relevant GUI... The Leslie simulation is not so bad... Midi implementation is very good for these two organs too (If you want to program midi tracks in a DAW ... it is very important). Two have midi learn feature to assign Midi controlers as you need. With Reaper, we may use a "midinotename" file to use it and with this exclusive and relevant feature, it becomes very easy to view lanes in the midi editor with their "name" (Their assignation)... I give you this remark because Virtual Organs require a lot of Midi CC for drawbars, knobs or switches and if you don't remind the assignation of all midi cc in your midi editor, it becomes impossible (excapt if you have an elephant memory !). At your disposal for tests...