Congratulations on your nuptuals!
As a Chicago native, I have a suggestion for you. If you still have trouble finding a song to step to, you can ALWAYS (and it NEVER fails) dig in the crates a lil' and use Jeffree Perry's "Love's Gonna Last". That is THE stepper's anthem, and works pretty well at weddings. That is one song that you can't go wrong with...
Good Luck