For middle TN you could add:
Black Abbey
Mayday
Calf Killer
Cool Springs Brewery
Fat Bottom
Jackalope
Turtle Anarchy
And the one located in my garage, Monkey Troop Brewery.
Also, Tennessee Brew Works that just had their soft opening. I think they will be big players based on their facility.
One word of caution. Not sure if you are planning to put on festivals, but seems to me that folks are starting to get "festivaled" out. Seems there is some function every weekend.