Good Whiskey in Atlanta
I have no clue about Cheerwine- any grocery store is as good a bet as anything else, as far as I know.
Other liquor stores- Green's on Buford Hwy (or Ponce); Tower on Buford Hwy (OTP); Toco Giant in Toco Hills.
Pearson's used to have the best Scotch selection in town. But their prices are dear, and the last couple times I've been in, it looked like they'd cut their inventory in half.