My main characters former love interest - a u of chicago MBA and stockbroker lives south loop (bc he went to u of chicago ;-) ). I was gonna go Hyde park but it just doesn't have that wasn't nuveau riche vibe. Perhaps printers row would be the better choice?
Try using City Data's Chicago neighborhood map. It links to all kinds of demographic information for each neighborhood, including average income.http://www.city-data.com/nbmaps/neigh-Chicago-Illinois.html