Hi Phil!
Giordano's is great, yes.
Is Gino's East still around? That was damn good za, back in the day.
I hear a ton of good things about Lou Malnati's
http://www.loumalnatis.com/
Then, there's Pizzaria Uno's and Due's...ahhhh....now thatsapizzaria!
http://www.unos.com/location.html Go to the one on Uno's
If your flight gets in early eve, dinner's not till 8:30 downtown at the Sears Tower (Metropolitan Club); for the real Chicago experience, I'd go to Uno's on Ohio St. If anyone has other suggestions, fire away.