I may be a little late to the party, but I can tell you some about Savannah.
The Savannah campus is currently a lot smaller than Macon, but they did just start renovating everything. Literally everything. We are getting new tutor rooms, a new library, a new clinical skills building. Anything that you might have seen on a tour will be obsolete in the next year. There is an article on it here:
http://news.mercer.edu/articles/201...expansion-of-savannah-campus.cfm#.VFqEgvTF-uh
Savannah has the beach, which is nice. We go to a lot of Sandgnats games during baseball season. We have Forsyth Park and Daffin Park, which are great for studying, people watching, lurking other people's dogs, or finding any kind of pickup game you could ever dream up. I've seen everything from ultimate to rugby to yoga and zumba going on in the park. Savannah also has this sweet little bouldering gym if you're into rock climbing. The downtown scene is pretty nice, with some pretty unique restaurants and River Street.
Either way you decide, you'll still be happy. MUSM has some of the best faculty any med student could ever ask for, and in terms of facilities, it's roughly the same (or will be once they finish the expansion). If you need anything else, feel free to ask!