This is a request for this beautiful Psalm setting by David Haas. My only concern is you will need a very good cantor for the verses and a pretty good assembly for the refrain.
The text is at Hymnary. You can purchase the sheet music on its own at sheetmusicplus or in a collection at GIA. You can also hear a sample of the music at GIA.
My backing has approximate chords.
This is great cantor and the assembly does very well considering the degree of difficulty: