Too many to choose from. I have many recordings by Jurinac, Christoff, Battistini, Lemeshev, Baker, Vanzo, Doria, Richard Lewis, Andrée Esposito, Ameling, Ian Partridge, Wunderlich, Mark Reizen, etc. How to choose? At least this Mireille duet unites two of them and shows the timbral and stylistic quaities that made them exemplary.