In Atlanta, value and desirability for family type buyers is mainly driven by schools, convenience and economic stability. I've been appraising and selling in Atlanta since '94, up the 400 corridor has been one of the most stable areas for a reason - mainly the ones just noted.
How a school fits your specific situation is entirely up to you, but if you buy smart you are not likely to go wrong in the Milton or Cambridge HS area. If you want specific market trends see http://hankmillerteam.com/atlanta-real-estate-conditions/mil
If you want it broken down further by community, home type, specific school, specific time....I can use my appraisal software to cut the data an infinite number of ways. Ping me with any questions.