Thanks for the replies everyone, I really appreciate all the insight! I had a chance to test ride a Raleigh (2013 model), a used Canondale Bad Boy, and the Breezer I linked to above. Equipping the Raliegh and the 'dale would have added to the cost, and to be honest I enjoyed the ride of the Breezer the best.

I'll head down to the shop this week and have them order a Breezer for me. I suppose I'll need to pick up a lock, helmet, and lights while I'm there (suggestions welcome as always!).

Thanks again for everyone's insight, especially those that have experience with MARTA.