Hi mandcrut237, you should totally go to Cornell. (this advice isn't at all biased by the fact that I'm 95% sure I am going to accept their offer and think it would be cool if we had two urch people in the AEM program). Now for the real reasons why I'd support cornell. I've talked with a faculty member there just recently and I took away a couple of cool things: 1. You build your degree around your concentrations, but only one concentration has to be in the AEM department, so if there are any general econ topics you want to also do while in grad school you can have committee members from the econ department (or other departments for that matter) to supervise your thesis (I think you mentioned that you wanted to do development at some point, Cornell's econ department has a lot of great people in development for example). You can also make your own concentration that isn't one of the big ones listed on their website, so you could do some kind of specialized urban econ for example. 2. The department has had a lot of excellent placements recently, and while there are many rumors about cornell's econ department having trouble placing people (I have no idea whether these rumors are founded, so do not in any way take this as me supporting those rumors as true) it seems that the AEM faculty are really committed to placing their students well.
As a more personal note, I just visited the campus recently to see what it would be like (and if I would be able to survive the cold.) They just renovated their building and it is REALLY nice, so that's a bonus too.
Anyway, I'll be really interested to hear what you end up deciding to do!