Sacred Treasures: Choral Masterworks from Russia on the Hearts of Space label is tremendous - exactly what you're looking for. The music is unbelievable beautiful and the recording and performances are absolutely first rate.
Music for the spirit and the soul
I had the good fortune of running across Avro Part's Stabat Mater today for the first time, and I've listened to it at least four times today. Although I'm not religious in the traditional sense, this recording moved my soul, brought goose bumps to my body and quieted my mind. Does anyone have other suggestions of classical (or other) music for the feeding of the spirit and the soul?