It sounded from your post like you are leaning toward the Montessori - and you said your daughter wants to return to that school. I've been researching Montessori quite a bit, as we are considering it for both of our girls for next year (PS and K). I don't think it's a great choice beyond 1st or 2nd grade, but for the early years I think it sounds great (IF the school truly adheres to actual Montessori methods and allows the child to go beyond what is normally considered "age-appropriate" material when necessary).
Have you considered talking to other parents who send their children to each school? Sometimes people with similar parenting philosophies provide the best insight, so if you know someone at any of the schools, ask for their honest feedback.
Good luck - I know what you're going through right now!!
