Are you going to be sending your kids to private school or public school? Or a combination ([private elementary and public high school, etc)? How did you make your decision?

DH and I are thinking about moving to a new area, and there's only one zoned public school, as far as I know, and while it seems to be okay, we don't know if it's GREAT. So our next option would be private school, either at a traditional private school, a Montessori School, or a Friends school. Of course these are freaking expensive--around $30k a year!! Does anyone have any opinion on these types of private schools, or on the whole private vs. public discussion? I'd especially love to hear from NYC mamas/Brooklyn mamas!!