re: I need the GSB's advice on my college decision

It's true Mercer is known for medicine, but that's because of their med school, not their under grad pre-requisites. I'm not saying they don't have a decent Science-based undergrad program, but I've never once heard someone say "definitely go to Mercer for their pre-med program." Also, while your aspirations are extremely admirable, you may start into pre-med courses, and decide it isn't for you. If that's the case, you're better off at UGA where you have more options if you want to switch. Also, if you ever move out of state and hunt for a job, there's a pretty good chance whoever is reading your resume has never even heard of Mercer. That's not to say UGA has the name recognition of Yale, or that Mercer people can't find jobs outside of GA, but sometimes stupid things like that make a difference.