'
As the owner of a Roland fantom FA76 I can endorse the above comments - if organ
sounds are of significant importance to you, then look elsewhere.
Roland do make a dedicated 'Hammond replica' (VK-8 + also an add-on module VK-8M)
that provide much better organ sounds, but at a price: close on £1500 for the
keyboard version and about £850 for the module.
For that money you get organ sounds only - so if you're after other voices, which
I assume you are by looking at the Fantom, my advice would be to forget about that
and try out other manufacturers.
You don't say how much cash you are prepared to fork out, but (as with most things)
generally speaking you get what you pay for!
Good luck.
.