He is known for his madrigals but I strongly recommend his sacred music.
I have four albums of his music, but the one that is essential is this :
Alfred Deller is a legend in the field of vocal music. Harmonia Mundi is a label specializing in Renaissance and Baroque music, and they are a reference in that matter.
Other responsories can be heard on Philippe Herreweghe's interpretetation (the album 'Sabbato Sancto' issued on Harmonia Mundi. Herreweghe is another master in interpreting Renaissance and Baroque music.
For the madrigals, you have the choice between Harmonia Mundi with William Christie and les Arts Florissants or the label L'Oiseau-Lyre with Anthony Rooley and the Consort of Musicke.