Doc's BBQ in Columbia, S.C.
Have never been to farm boys, but I've been to Doc's a number of times, and it is fantastic. Their lunch buffet I think is around 8 dollars with a drink. They always have two types of bbq--mustard and vinegar. I'm not a mustard fan (and my mom's from O'burg county! the horrors!), but I can tell you the vinegar bbq is the best you're going to get outside of NC (just barely edging out Bo-B-Q--that place on Knox Abbot). Also have fried chicken and catfish daily. I can personally attest that the fried chicken is divine. Don't eat seafood, but my coworkers love the catfish. Sides are trad. southern fare--all very good, but the best is the Chocolate Dessert they have. Its served hot, cakier than a browny, but gushy in some places--well, its delicious, whatever it is. Yum.