I’ll speak up for Milton 
if only to say that Deerfield and Milton are VERY different (even more so IMHO than Andover & Exeter) and you really should consider both of them carefully. Quite a few of GMCkid’s friends (as well as GMCkid) looked at Deerfield and felt that it wasn’t right for them, for whatever reason. Many of these same kids loved Milton. They have different vibes and might appeal to different kids. Will you be going to revisits?