Le Coze at Lenox is easily accessible from MARTA.
If you're leaving the airport, though, there is a new restaurant (<1 year) in downtown College Park (yes, one MARTA stop away) just a short walk from the station.
Andy's or something (a single name) which is in a dilapidated downtown strip in College Park but is apparently so busy you can barely get in.
Sorry I don't have the name but it's supposedly terrific!
The name of the restaurant for Southern food (meat and 3) is Paschal's
JL