Prior to Omar, my favorite two "modern" operas are from the 1950s, Barber’s Vanessa and Moore’s Ballad of Baby Doe (with Sills 5 arias in my head whenever I think of them). So, this Omar was very special.
While I have heard and appreciate Busoni's Doktor Faust (in my permanent collection) my favorite and my wife's is Boito's Faust (saw it with Ramey) and Gounod Faust (too long for her).