Most places outside the perimeter are very car centric, family oriented, any town USA type places. If you're looking for a rich white suburban location with low crime, anywhere from east Cobb through north Fulton to north Gwinnett would be a good option.
As for Atlanta proper, Midtown, Morningside, Virginia Highlands, Candler Park, Inman Park, Grant Park, or Poncey Highland is probably your best bet, if you would be working downtown and looking for a nice/clean relatively safe in town neighborhood. If you are working in Buckhead, you might want to look into Brookhaven.
O4W, East Atlanta, Castleberry Hill, Kirkwood, the West End, and the “westside" neighborhoods (the ones near White Provisions, King Plow, and the Goat Farm artist complex) are great places with a lot of fun and creative people, but they are still in transition, which I have found lends to a more neighborly feel. O4W is probably the most transitioned, and has retained its diversity to a certain extent. I love living in Castleberry Hill (just south of the Georgia Dome) but intown living in transitional neighborhoods is not for everyone.
Good luck finding the right neighborhood for you!