Considering a tour through MISSISSIPPI... Advice needed???

Considering a tour in the near future... not sure when but have some questions...
Planning on going to Hattiesburg, Jackson, and then Birmingham. I'm undecided on where to go after Birmingham. Should I go to Atlanta? Or just head towards Montgomery? Finally, are there any towns/cities in between that are recommended?

Thanks in advance for your input.
I almost suggested Jackson before I realized you're going there BEFORE Birmingham... reading is fundamental.