Sorry for being so harsh on Tufts. There are several reasons for this. I've been dinked around by that school long enough. They sent me a "delayed decision" in April, then I just found out I got waitlisted. Not that I wanted to go there, but it seems many people in the "DD" category do get waitlisted, even though the administration says that's not the case.
My reasons against Tufts are the following. I find their price tag a joke. It is one of the most expensive schools, and in one of the most expensive cities. I for one want to incur as little debt as I have to over the next 4 years. Another thing I didn't like was that there is no real campus, it's just buildings in a city mixed in with other non-med school buildings. Coming from an undergrad with a beautiful campus, I really didn't like this part about Tufts. Yes, there are the public gardens near by but it's still not the same in my eyes. Also, for what I'm interested in, Internal Medicine, Tufts match list pales compared to other schools I've gotten into. So maybe for what you want to do, it's different. As for living in Boston, I want to get out. I think the pace of life here is extremely fast and I'd like to live somewhere new. THat said, Boston, despite the high price tag, is a great city-- lots of history, nice architecture, museums and art galore, fantastic river to run around.
I do better in warm weather, which is a major plus in my mind for Emory. They have a well-reputed school of public health right next to the CDC so if you're interested in public health it's a great school to be at. Yes the public transportation is unreliable and you'd have to get a car. I've heard, but didn't get this sense while I was there, that the students are a bit competitive. The campus is gorgeous, and it gets warm there a whole lot earlier than in Boston. The school administers tests that are said to really gear you toward the boards (I forget what they call those though) so that was a plus for me as well.
These are just my opinions. People seem to be of two minds when it comes to picking a school. There are the label-****** who say "Go to the best school possible" and then there are those that say "Go where you will be happiest." I go with the latter, as I think your happiness will be what sustains you best. Only you can know what's most important to you.