Are you more a 'cultural' or a 'biological' person?
i agree that "There's definitely room in anthropology for model-building and projection/fieldwork comparisons"
check out the book by Boyd, R. and P. J. Richerson, if you haven't already
http://ndpr.nd.edu/news/24826-the-origin-and-evolution-of-cultures/
Have you looked into Ball State? Just a warning: With a 3.2 GPA, some schools might not even look at your SOP and letters, however strong they are. Big schools like IU receive so many applications, so GRE and GPA are quick ways to deselect applicants.