The Song Fight Bulletin Board

What are your experiences with realistic choir virtual instruments? Favorites? Disappointments?

Any gospel ones, in particular?

If you don't care about the phonetics, the ones that come with Logic are vaguely serviceable, and I assume the same could be said for any of the large instrument collections like NI KOMPLETE or whatever.

Whenever I want a chorus I just record myself a dozen times and then use a vocal transformer to fiddle with the formants/pitch/etc. which is probably why my choruses always sound like crap.