Sometimes one just has to go with what is available, so just bought a ticket for this Wednesday's performance by the National Symphony:

Tristan und Isolde, Act II

Conducted by Gianandrea Noseda

Isolde: Christine Goerke
Tristan: Stephen Gould
Brangäne: Ekaterina Gubanova
King Marke: Günther Groissböck
Kurwenal: Hunter Enoch