Piter -
I went to Georgetown for undergrad. I was in the business school, and although it wasn't the MBA program, there were a lot of similarities. We had a lot of the same courses offered, the MBA's just had one or two more papers than we had as undergrads. I had LOTS of friends going to Wall Street after we graduated, and that was during the downturn in 02-03. And Gtown's name carries more weight on the East Coast than it does out in the Midwest (where I am). I can't speak to Simon's name because I don't know much about it.
Location-wise, I think Gtown has it over Simon, although as a graduate student you may find the Gtown campus a bit "undergrad-ish." It's an amazingly beautiful campus though. However, as a grad student, you won't be living on campus so I'm not sure that would matter. They are building a GORGEOUS new big building just for the business school, and I'm totally jealous as our classes were kind of everywhere around campus. Also Gtown is very big on international experience, so you'd probably have some opportunity to study/intern internationally if you're so inclined. Obviously I'm a little biased and since I don't know much Simon, I'm not sure it helps but if you have any questions about Gtown in general I'd be happy to help.