I have long been a fan of the Cardinall's Musick and their singing of Renaissance music. Their Byrd series, first started on ASV's Gaudeamus and now on Hyperion, represents a wonderful attempt to record Byrd's complete sacred music, and it is being beautifully done.
There are many volumes to choose from, notably the three masses - a deservedly award winning recording, but this is my favourite. Among the items are Rorate caeli, Lamentations, Christe, qui lux es, the magnificent nine-part Domine quis habitabit, and the Audivi vocem de caelo.
However, the stand out for me is the Peccavi super numerum a 5, the last track on the disc. The blend of singers throughout the series is superb, representing a more heartfelt, gutsy, perhaps truly consort style that is possible with the highest calibre of professional singers: in this motet they draw back and focus their voices superbly, with the opening semitone rise and fall given not much flow and ebb, or indeed dramatic dynamic shading, but as the motet builds, such is the combined beauty of dynamic, tempi, diction and timbre of voice that one can't helped but be moved by this motet, which in translation reads as "My sins number more than the grains of sand in the sea".
Any CD from this series is worth the money, this one particularly.