Even cheaper than Kontakt........a very useful (32bit) choir, is within IK's Miroslav library. There's a pretty good selection and with very little tweaking, I've had pretty good results with it......YMMV. (Also, you get a full orchestra to go with your choir.)

Linear Phase
If you acquire a choir, I'll acquire a lyre.

Oh LP...you're a lyre....

But seriously folks, I was working on an album with the infamous Dave Soroka and he got a bad case of wanting a choir for backup. So he brought in 8 friends, mix of guys and dolls, none of which had ever sung in the true meaning of the term. I put a stereo pair up and some low volume floor wedges and they sat on the couch and a few office chairs and drank tequila. Dave called them the Tequila Angel Choir. We double tracked them , 4 tracks total and a huge reverb and stereo spread.
 
Scroll to bottom of his page for song samples, Hmm, seems Dave highlights that album as one of his better ones, I'm flattered, Looks like he hasn't updated his web site in a while. 
http://www.davesoroka.com/
 
Total cost of session
Choir= $60 for tequila.
Studio- 3 hours  

Rain

 If these guys are from Canada they might only sing in french depending on where in Canada they are from. Rain I thought of you yesterday. I had to talk with a technical support person from Canada. You could tell English was his second language, but he was very understandable when he talked in english..... I'm not sure I could make out monkey english with a  french accent..

I learned to speak French by watching Pepé Le Pew cartoons. 
 
No one lets me order in French restaurants.

UbiquitousBubba
I learned to speak French by watching Pepé Le Pew cartoons. 
 
No one lets me order in French restaurants.

So instead, you must be a ladies man.....a charmer.......a Scent-imental Romeo?
 
 

Starise
 
 
 If these guys are from Canada they might only sing in french depending on where in Canada they are from. Rain I thought of you yesterday. I had to talk with a technical support person from Canada. You could tell English was his second language, but he was very understandable when he talked in english..... I'm not sure I could make out monkey english with a  french accent..

The accent is very hard to lose. I don't know if the difference is as obvious to english speaking folks as it is to us, but I can say in favour of my fellow french canadians that they at least try to get the pronunciation right most of the time, unlike people from France who often seem unwilling to even try - they speak english but with their french accent.
 
My wife had private lessons booked by Cirque the first summer in NY to make sure that her accent was as inaudible as possible when she sang - because the songs were originally all in english. She really enjoyed it and started making fun of my own accent almost immediately. But I still have the better vocabulary. ;)