speaking of Harnoncourt, Hurwitz has this as a reference recording for Mozart's Requiem (this is Harnoncourt's second traversal of the piece, he has a more famous, previous recording on Warner)

https://www.youtube.com/watch?v=u0hYGIQkSG0&list=OLAK5uy_ky5Dk-2QJ5sq1LNjeCXfjXrAOLzRSwbPE&index=9