When do they do
Madama Butterfly, La Traviata, and
Rigoletto? But that's all kind of recent. How about
Endimione e Cintia, which is a couple hundred years older? Sample:
Singers who can actually sing, and players who can play, and composers who can compose, make all the difference.
Music is like painting or literature. 99% of it in any year is crap, but the crap doesn't last long. Stick with whatever is at least 50 or 100 years old, and time will have eliminated the crap so you can listen to the really good stuff.