If you haven't checked out the Chihuly exhibit at Cheekwood, you should make it out there before the exhibit closes at the end of October. I think the best time to go is about 6 p.m. You can see it in the daylight, then hang around until it gets dark and see it when it's lit up at night. In terms of numbers of people who have seen it, I've heard that it's the most successful art exhibit in Nashville's history.
I'm planning a vacation to Tennessee in the next few months. Passed through during the summer on the way to Florida and fell in love with the place. I'll make sure to keep some of this in mind when I head for Nashville.