Since you are interested in 100 Best Operetta, here is a list of other items that you may find interesting.
HENRY PURCELL / GEORG FRIDERIC HANDEL
Sound the Trumpet - Royal Music Of Purcell And Handel
Alison Balsom (natural trumpets) / The English Consort, Trevor Pinnock
[ Warner Classics / CD - released 19/Oct/2012 ]
"For historical accuracy, she plays the valve-less "natural" trumpet: it really does appear to offer a more direct access to the human voice, a quality confirmed when she duets with countertenor Iestyn Davies" (The Independent)
PUCCINI / BIZET / DVORAK / OFFENBACH / DONIZETTI / VERDI / etc
40 Most Beautiful Arias
Maria Callas, Placido Domingo, Cecilia Bartoli, Kiri te Kanawa, Jose Carreras, José Cura, Angela Gheorghiu, etc
[ Warner Classics / 2 CD - released 10/Feb/2009 ]
Nothing stirs the soul and tugs at the heartstrings more than an inspired operatic aria. Warner Classics CD set 40 MOST BEAUTIFUL ARIAS collects forty of the most moving ones the world has known on this star-studded collection.