Gesualdo "First Book of Madrigals" - Les Arts Florissants, Paul Agnew, Harmonia Mundi
A real test of your hifi. If it can present 16th century polyphony in a believable form then you have a good hifi. Do the voices present clearly and separately? When you close your eyes can you imagine you are sitting in a church or a concert hall with the singers in front of you?
I'll listen to the Second Book tomorrow. 🙂