Chicago or Styx? Who is The Better Band out of The Windy City?

As a big Styx fan, I have been using the phrase "the greatest rock n roll band from Chicago" on air for many years everytime I come out of playing a Styx song. It's just a matter of my opinion and my love for Styx. Earlier this week WPDH was bombarded with complaints by people from all over the U.S. including an administrator of a facebook fan page for the band Chicago(see below). Got me to thinking, what is your favorite band out of the Windy City?