wordshadow, I was also accepted into FSU and went to visiting weekend. For me the big competition was UT Austin. Austin is a much better college town than Tallahassee (which like you said, isn't super important). UT Austin offered me full healthcare, but with a smaller stipend. As far as research, my interests lie mostly in state and local politics, which FSU is much stronger on than UT Austin.
I felt at the visiting weekend that while FSU is very quant heavy, there is room for mixed methods research. In fact, a few of the grad students I talked to at the dissertation stage were using mixed methods.
What really sealed the deal for me though was that I felt much more comfortable with the faculty at FSU rather than at UT Austin.
If you pick FSU I'll see you in the fall