Eric,
if you are looking for choirs the Fantom XR has some of the best vocal sounds I have ever heard. And, speaking of ethnic sounds, the card SRX 09 (World Collection) is dedicated entirely to ethnic instruments and rhytm sets.
What sets the Fantom XR really apart from other modules is the ability to install eight expansion cards, which are much better compared with the PLG cards available for the Motif (and also for the 9000 pro). Plus, in the Motif ES rack you can install only two of them...

You can find audio/video demo's of the SRX cards here:

Let me know if you have more questions.

[This message has been edited by Dreamer (edited 05-02-2006).]
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Korg Kronos 61 and PA3X-Pro76, Roland G-70, BK7-m and Integra 7, Casio PX-5S, Fender Stratocaster with Fralin pickups, Fender Stratocaster with Kinman pickups, vintage Gibson SG standard.