QUOTE(false_harmonic @ Oct 7 2009, 02:24 PM)

Would love recommendations for Il Barbiere di Seviglia (Berganza or Agnes Baltsa?), L'Italiana in Algeri, Rusalka, Dido and Aeneas (Janet Baker? Tatiana Troyanos? or any other suggestions?), Sanson et Dalila, Orfeo ed Euridice, Tosca, La Traviata, Tristan und Isolde...I think that'll do to be getting on with, I can think of plenty more, but I don't want to start typing out millions!
I'm very fussy about opera recordings because personally I don't like listening to singers who roll their 'r's overly much. I think Victoria de los Angeles has got a beautiful voice but for me the recordings I've got of hers are spoilt by the very pronounced 'r's

This may not bother you though!
With regard to some of the operas on your list, I'm happy with the following recordings, although some of them are "Highlights" so they may not suit you if you want the full opera...
Rusalka - Czech Philharmonic Chorus and Orchestra, Vaclav Neumann, sop Gabriela Benackova, ten Wieslaw Ochman. (Highlights)
Samson et Dalila - Symphonie Orchester & Chor des Baverischen Rundfunks, Sir Colin Davis, sop Agnes Baltsa, ten Jose Carreras. (Highlights)
Tosca - Orchestra of the Royal Opera House Covent Garden, Sir Colin Davis, sop Monserrat Caballe, ten Jose Carreras
La Traviata - Ambrosian Opera Chorus - Philharmonia Orchestra, sop Renato Scotto, ten Alfredo Kraus. (Highlights)