Since my daughter has decided to apply to music conservatories as well as
to colleges for school next year, we are reviewing the options to be sure
that we have looked at all institutions of interest. She wants a conservatory
with a very strong vocal performance program (not just theory, or just
instrumental, or just composition) and prefers the Mid-West and East in the U.S.
As a second generation native Californian, she feels she would benefit from living
in another part of America during her college years.
Although there are at least a dozen large annually-updated guides to colleges
(Fiske Guide to Colleges, Insider’s Guide to the Colleges, The Best 361 Colleges,
etc.), we have not yet found one just for music conservatories. There are
several like Creative Colleges: A Guide for Student Actors, Artists, Dancers,
Musicians, and Writers by Elaina Loveland, which cover a variety of related
programs but do not provide in-depth, comparative, current information like Fiske.
Fiske lists conservatories but does not profile them. The list in
U.S. News & World Report just refers to the Elaina Loveland book for more
information. There is a Wikipedia entry on
Music schools in the United States but it just lists web links for the schools.
My daughter is also checking in with her High School college counsellor, her voice
teacher, and her choir director and we hope we will know what ground to cover by
checking all of those sources.
KatysBlog 
Wikipedia doesn’t know about the Shepherd School at Rice. It was founded about 30 years ago, when I was there. At that time, they focused on ensemble playing, but that might have changed in three decades. I see that they offer a doctorate in vocal performance, so they do have a voice program.
They also have an excellent organ, Fisk Opus 91.
Rice has a really good undergraduate atmosphere, with residential colleges so you start out with your own local community.
Check out Depauw University (School of Music) in Greencastle Indiana. Well-known Opera Singer Pamela Coburn is teaching on a fellowship there. She also is a graduate. http://www.depauw.edu/music/people/faculty/coburn.asp