The contemporary composer K. Lee Scott has composed a choral piece called Requiem that uses Donne texts. You can learn more about him, and about how to order a CD of Requiem here:
http://www.kleescott.com/
I heard some of this on a local classical music radio station. Sounded very nice.
He has also done a setting of "A Hymn to Christ" that you can learn more about here:
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