Looks like there's an entire course dedicated to Existentialism. I know jack about philosophy, so I can't say what else could be of interest to you on that page, but it seems fairly comprehensive.
As for size, it really depends on what you mean by "urban". Portland's a city. Reed's by Portland. There's your urban college. Of course, if you mean you want a school with a large student body... it depends on why. Is it diversity you want? Do you just like seeing different faces all the time? I've gone to a high school with 3,000+ students and currently attend a private school where the graduating class numbers at 38. I've got to say that 1,000 sounds like a fine size to me, but I'm of the opinion that the bigger schools just lend themselves to cliques and High School 2.0's. That's just my opinion though.