As a little side note I am in St. Louis right now, and if the Bucks did have to move in the next five years or so, I think this might be a cool place. This is undoubtedly a baseball and hockey town, but it looks like all the local places really throw their support behind their teams.
They have the Scottrade Center which held 22,000 some for the Missouri Valley Conference Tournament in 2007 which is pretty good. I'm not sure what the luxury suite situation in there, but that is a lot of seats. They also have great chicken wings everywhere you go. Delightful.
The Cardinals suck though.