napoleon314,
I'm pretty interested in hearing how you actually do. I think your GPA is definitely good enough, even for a top school (GPA just isn't the most important factor), and your GRE scores are quite good, and I imagine you're just generally a well very well rounded candidate and a rather smart fellow. However, as you know the schools you applied to are extremely competitive and hardly anyone has a good shot of getting in with that particular list (I'm guessing Michigan is probably the least competitive of those), and I get the sense that most philosophers don't care that much about interdisciplinary studies and/or backgrounds. In fact, when I was an undergrad, I was considering double majoring and the advisor in the philosophy department told me not to. The advice was to just focus on philosophy because admission committees wouldn't really care about or know how to assess what I did in other fields. I do know of some people who got advanced degrees (law, medicine, etc) before going on to philosophy, but if I were you my biggest concern would be my relative lack of formal background in philosophy - I don't think this would hurt you at slightly lower ranked schools, but again, you applied to tremendously competitive programs.