I'm supprised no one has mentioned Theta. I've used the Casablanca for 6-7 years and have just upgraded my original processor to the version III. I couldn't be happier. With the Extreme DACs the unit is really detailed but musical. You can find the original Casablancas for < $2000.00 and the version II's for < $3500.00. The Casablancas have a stereo pass through (although only for single ended inputs) and analog volume control.
Good Luck,
John
Good Luck,
John