I was up in Chicago last week, and visited The Chocolate Box again. It turns out that they change their selection every three months, and while the Salted Caramel and Havana Heat were still there, the Pilsen was gone, as were all the other neighborhood-themed chocolates. They were replaced by flavors such as Pecan Pie, which was flavored with maple, molasses and bourbon; Wassail; and Sesame, which was flavored with sesame oil, and was my favorite among the new chocolates that I sampled. To be honest, I think I preferred the old chocolates to the ones that replaced them, but there's still a lot of good stuff there.
I also tried their chocolate-covered toffee, which I didn't like: it was too sweet for me.