Hey cml,
Congrats. I haven't actually been down to visit but I am planning on doing so. My undergraduate professors recommended the program to me. Apparently, it has a great reputation (right up there with Indiana, Georgetown, etc.). But what really excited me about it was the faculty. It depends on what you're interested in studying I guess, but for example Dr. Donlad Raleigh is one of the best contemporary scholars of Russian history and various other faculty members had a lot of intriguing research interests and backgrounds in various facets of RUES. Additionally, I looked at the thesis projects current student are researching. One or two were pretty bland (for example "State Building in Chechnya" - hasn't that been done to death?). But quite a few were really innovative and interesting (one that's stuck in my mind is "A comparison of the funeral trains of Alexander III and Abraham Lincoln" or something like that). So that gave me confidence that I could develop a fresh and innovative thesis at UNC, and not merely find myself wading through a field of stale and unoriginal topics and approaches.
Also, the area has a good reputation. I didn't really want to spend two more years in the northeast, no matter how good the programs at Harvard, Colombia, etc. are (which is not to knock those programs at all, simply not for me is all). So I'm looking forward to the pleasant climate and friendly atmosphere, hopefully they will be more conducive to my studies then the NE's eternally grey Novembers and snowy winters (ironic given the field of study, I know). And while I admit that I'm not really an expert on either program, UNC's seems to be significantly better than Duke's.
Anyway, I recommend trying to correspond with professors at all your acceptances with whom you are interested in working. Could help you eliminate some possibilities and get more excited about others.
Good luck!
P.S.
I'm not quite in grad school mode yet, so forgive any typos, spelling mistakes, bad grammar, etc.