With WPI on your list, you should probably also be looking at Stevens Tech, which is every bit as good as WPI. Hoboken, NJ has an urban feel with a lot of young professionals living there. The campus sits right on the Hudson River, and is literally looking right across to midtown Manhattan. Midtown is only a short ride away on the commuter rail.
Rice in Houston would also be worth a look, very good in Engineering. Also look at Case Western Reserve University in Cleveland. And University of Pittsburgh, University of Wisconsin, and University of Maryland, which is right on the edge of DC. Maybe University of Minnesota?