I don't have any personal information to help you, but I did want to mention that in Hernandez' A is for Admission book (college stuff) Acton-Boxboro Regional (public high) is on the list of schools with the highest acceptance rate to Dartmouth (which is a stand in for "Ivy League" ). It's up there on the top ten list with Phillips Exeter, Phillips Academy, Deerfield Academy, etc. Just an FYI while you are considering your options.
I note that Mich has also mentioned this school district (and its competitive culture), and with first hand experience, may be able to give you more information if you want it. I don't know about this, but I imagine that Acton is just far enough west to be a little more affordable than Lexington...
