Here's a short demo I've just created for Vienna Solo Voices,
http://www.emismusic.co.uk/synclub/Piece%20For%20Vienna%20Solo%20Voices.mp3
It has 6 singers (the coloratura Soprano is in there as well), positioned in the Graz Maria Strassengel church curtosy of MIR Pro.
I don't normally write choral music, so apologies to all the phrasing anomolies that I have probably created recording this.
It's a direct link to the best quality mp3 I could encode, as I didn't feel the need to creat a YouTube video.
I hope it shows the great potential of this vocal library.