What are the Top 10 Conservatories in the Nation for Clical/Opera?

I am a Tenor in High School and beginning my college search. I really enjoy the conservatory aspect of things when you focus solely on music and nothing else. However open to other Colleges and Universities. Can you give me your top 10 Music Depts. and or Schools in the Nation. I would like to major in Performance but also would like to major in Choral Education. Is it possible to double major? If so where... THANKS