Where to buy a nice dress in Knoxville?

Knoxville, I am in search of a stylish and affordable (under $100) summery dress that I can wear to a fancy wedding in New Orleans (and again later). The wedding will be indoors (thank you, Lord), but I plan to be outside in said fancy-and-yet-affordable-dress. Where should I start looking?

Here's my current list of places to try: ReRuns on Union, Crush on Jackson Ave. (because I haven't been there yet), and Hot Horse on Jackson Ave. (which houses the carefully selected remnants of Janet's beloved vintage shop Legacy). I'm prepared to go to TJ Maxx and Marshalls, but I'd like to support Knoxville's burgeoning fashion scene and avoid cheap-but-stylish things made in China. If I were feeling flush (and the wedding not quite so formal) I would buy trunk loads of Wildcrafted Fashion from Konane.