As long as you are going to be in the area of Cappuccino Bay Aquarium (CBA), you might as well stop by Pets Unlimited as well. They are not a sponsor member, but have quite a dry goods selection. Prices are good. To me, they seem "hit or miss" on the corals, but they have a nice selection of cleanup critters and fish.
http://www.petsunltd.com/
I could suggest a few more places if you are wanting to make the grand tour, but honestly, the places already mentioned are really good. I live in the NW part of Atlanta and do 95% of my shopping at Marine Fish, CBA, and Pets Unlimited. Marine Fish is the farthest from me, but they got me kick started into this hobby and always have a nice selection of very healthy live goods (and good advice) so I frequent them often.
-Chris