You and/or your singers will find these study recordings to be a great help in preparing this masterwork. The sheet music for this recording is published by Schirmer.

I have used the PartPredominant recordings myself, and found them very helpful and easy to work with.

Other PartPredominant Recordings:
The Messiah
And the Glory of The Lord
For Unto Us a Child is Born
Hallelujah Chorus
Lift Up Your Heads