I was actually not a big fan of opera until I got the HD800/Modi multibit combo. Being able to hear the spittle move inside the performers mouths as they expressed so much emotion in tuneful fashion sealed it. And the coherency and room acoustics of the entire space around the performers as they jammed with the musicians... it is kind of bad ass. Been devouring Mozart's Figaro, Don Giovanni and Solti's rendition of Wagner's Ring Cycle. Just a crazy ride.
Any other suggestions for great operas on that level?
Bizet's Carmen; I have the VK, Baltsa, Carreras on DG, but there could very well be better singin' and playin'
Puccini's Tosca; I have several but my favorite perf and sound is Davis, Caballe', Carreras, Wixell. The De Sabata, Callas, Di Stephano, Gobbi also.
Wagner's Tristan und Isolde...(several versions)
Strauss's Solome... (Solti, Nilsson)
Berg's Lulu; Only if you can manage 2nd Viennese School, murder, mayhem, a vicious self-centered bitch as the heroine and Jack the Ripper.
How much fun can you take? (Boulez - Cerha completion)
Their all about love and death, and everybody dies happily ever after (or will be condemned to death), well, except for Jack.
Other fun favorites of mine where not everybody dies when it's over but someone is, or should be, guilt ridden and miserable; La Boheme, Madame Butterfly.
Happy endings(!); Turandot, Magic Flute, Die Meistersinger.
Special case; Parsifal, the music is extraordinary (as is all of Wagner's music).
Reading a detailed synopses may give you a sense of if it's up your alley or not. From the standpoint of the music alone, these, in addition to the ones you mentioned above,
are the core of my opera likes.
Our resident operafile, bosiemoncrieff, would be the authoritative source on the singing performances.