There are so many schools! Have you posted on the music major forum? That forum is open to non-majors who still want to pursue music 
Is financial aid a possibility?
“Little Ivies” like Tufts, Williams, Amherst, Wesleyan, Ivies like Brown, Harvard, Princeton, and Vassar, Davidson, MIT all come to mind. If the music supplement is good, it will boost his admissions chances (in our experience) and his stats look excellent so he should meet the benchmark. I like the music program at Clark University (check out Colleges that Change Lives).
For a non-major it is often wise to avoid schools with BM programs or even double degrees (Tufts ended theirs, Harvard and Yale have one). Princeton has a performance certificate.