Bryon, IMHO the companion piece found on the old Willcocks/Kings Allegri recording; Palestrina Stabat Mater is even better.
Actually if you like this kind of music, any of the english cathedral and collegiate choirs doing renaissance music will please you. Byrd,Tallis,Pallestrina,Vittoria,Thomas Tomkins,Orlando Gibbons (my favorite),Thomas Shepherd,Robert White, and a host of others.
You should also listen the the Vaughn Williams Mass in G minor.A 20th century piece written in the style of Byrd or Tallis and a real beauty.
Also, look for mixed groups such as;Tallis Scholars,The Sixteen,The Scholars,The Clerks of Oxenford,Corydon Singers,
these groups are often ex members of the collegiate choirs and are early music specialists.It is in these groups that you will find the most esoteric pieces.
I have had the good fortune of singing countertenor in a very good American cathedral choir for most of my life, and I am well steeped in the tradition and these composers and their works.I have done the Allegri several times.
If you are looking for vinyl versions, there are many to choose from. If you need specific help, send me a email and I would be glad to discuss this at length.
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