This topic seems to come up every year. Here are some past threads on the subject:
http://talk.collegeconfidential.com/musical-theater-major/1694166-top-mt-programs.html
http://talk.collegeconfidential.com/musical-theater-major/1617651-top-programs-p1.html
http://talk.collegeconfidential.com/musical-theater-major/912438-top-mt-bfa-programs-p1.html
http://talk.collegeconfidential.com/musical-theater-major/389999-mt-colleges-tiers.html