It's not surprising that this sublime performance of Wagner's Tristan und Isolde has remained on the market for so long: Wilhelm Furtwängler's reading of the tale with Ludwig Suthaus, Dietrich Fischer-Dieskau, and Kirsten Flagstad is probably definitive. The conductor is peerless at achieving a strong sense of direction throughout the epic length. Carlos Kleiber's controversial version with the Dresden State Orchestra might boast orchestral fireworks (abetted by modern recording technology), but if you're looking for a Tristan in which the singing takes center stage, this is the recording to buy. Newly remastered with Abbey Road Technology as part of EMI's Great Recordings of the Century series. --Joshua Cody
