Choral or Classical Vocal Recordings - Must Have


In the last six year I have opened my ears to choral music and classical vocal recordings. I would appreciate hearing what your Must Have list is, so that I can discover more wonderful music that maybe I haven't yet heard.

My list is in random order and is as follows:

-Magnificat by John Rutter - COLCD 114
-Lux Aeterna by Morten Lauridsen, Los Angeles Master Chorale - RCM 19705
-Let Your Voice Be Heard - Cantus - CTS 1201
-Olde English Madrigals and Folk Songs at Ely Catedral, Rutter and the Cambridge Singers - AG500-2
-Vepres by Rachmaninov - The Choral Arts Society of Washington - ERATO 2292-45269-2
-La Belle Epoque, The Songs of Reynaldo Hahn - Susan Graham - Sony SK60168
-O Magnum Mysterium by Morten Lauridsen - Nordic Chamber Choir - BR 100 305 CD
-Requiem by Faure - John Rutter and the Cambridge Singers - COLCD 109
-Renee Fleming - Renee Fleming - DECCA 289467049-2
-Litany, Arvo Part - The Hilliard Ensemble - ECM 1592
-Vivaldi Gloria - Robert Shaw Chorus (Dawn Upshaw in this) -Telarc CD-80194
Gloria by John Rutter - The Cambridge Singers - COLCD 100

I could list others but this is the core of my collection which I never tire of. What's yours?
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I agree completely with Gonglee3 about Jo Sumi (in the US, her name is reversed to Sumi Jo, which itself, I guess should be Su-Mi Jo?). Anyway, her voice is remarkable and any of her CDs (which are widely available on Erato) will delight you.
A new CD that is absolutely astounding--better than most listed already here that I have checked out; 'Sacred Feast--Gaudeamus'. Directed by Paul Halley on DMP records, available on Amazon. Tracts 7- O Sacrum Convivium and 11- Pater Noster, are an epiphany.
I implore you to check it out!
Note that it is a hybrid SACD, so it can be played on a regular CD player or an SACD player.
"Montserrat Caballé sings Puccini arias."
EMI CD or LP.

Trust me...you'll wet your pants!
A choral work that would have your stereo gear hopping and also give you a thrill is Prokofiev's cantata, "Alexander Nevsky." It was composed for the Eisenstein film of the same name.

If possible, try to pick up a copy of a Russian chorus singing it. There is nothing quite like hearing the unique sound of Russian voices singing the Russian language. Valerie Gergiev and the Kirov orchestra and chorus, joined by contralto, Olga Borodina, released a recording of it on Philips about a year ago. There is also the old Reiner/Chicago recording which is damn good.

You won't need a diaper for this one but your speakers may need oxygen after "The Battle on the Ice" movement.

Best regards.