J.K.
I live in East Cobb in Plains Estates -- it's a smaller, older subdivision, but the schools from Elementary to HS are all in the top 10 or 20 for the state (Mt View Elementary, Simpson Middle, and Sprayberry High).
I love living here because I can trust my daughter (7) to go over to her friend's and know it's a no-cut-through, less than 100 home neighborhood, and my son (3) can play with us and not get plowed over:)