Love this topic. I'm obsessed with the Ring. I think I have 14 1/2 recordings (Gergiev being the 1/2). I think the three best are Solti, Keilberth 55 and Karajan. I couldn't live without them. Karajan's Walküre is magnificent, Keilberth's cast and conducting is near flawless and Solti's set is magnificent in that it presents the Ring is such a monumental way. I've avoided Krauss due to the sound. Not sure I can handle mono.