My first love is organs so:
1)60's & 70's
2)session
3)Pop
4)Orchestral
There is nothing you can't do with these choices, in a classic, pop genre. If you need techno or hip hop stuff - I'm not the one to give an opinion. I avoid that stuff, so it wouldn't be fair.
Most bang for my buck? JV1010 w/ 60's 70's!
That gives you the session built in and all the great organs from the board!

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Uncle Dave