Hickory Pit, Jackson, MS
Best sweet sauce I have run across. Real barbeque (pig), of course.
For chain barbeque restaurants, Sonny's is consistently good.
I second that re: the Hickory Pit. Also include Letha's in Hattiesburg, Ms. A great BBQ place originally in a old shack in Foxworth. Letha's daughters took over the restaurant when she retired and moved it to the closest college town (Uni. of Southern Miss.). Based on its success it was a smart move...
We had Sonny's in Somerset, Kentucky. I thought it was awful.