azimm85,
While I cannot attest to the strengths and weaknesses of each of the programs you are applying to, I can provide insight on Vanderbilt, making the connections in a big city, and other considerations for grad school.
I'll start with DC schools. My perception is that they bank on using the "access" card (e.g., you have access to world renown institutions, internship opportunities etc.). True. Up to a point. However, these schools in D.C. get tons of applicants and tons of students. They make money b/c EVERYONE around wants to go there. They don't NEED to focus on students b/c there will inevitably be a constant influx of new students. (Lived in DC, applied, was accepted and offered money to DC schools). If, however, they have the best education policy program -- all of that should be irrelevant to you.
Now Vanderbilt is a different story when it comes to education. Peabody (the Ed school at Vanderbilt) is one of THE best in the nation. Consistently. If you're sure want to study education policy then I strongly recommend following up on Vanderbilt. Find alumni, ask questions, visit classes, speak to current students. Do your homework. Your grad degree will be 2-3 years max. If you want to end up in a big city, working on a Master's degree elsewhere, will not hinder you from doing that. And to anyone in education, the Peabody, Vanderbilt credentials are strong.
In terms of other factors, don't constrain your decision too much by the location factor. This is flexible after school, you'll be incredibly busy during school, and in addition, you have to take time and "see through" the advertisements that schools are selling you.
Best of luck with your decision.
