We're in Atlanta too, and have been looking for a Super-C. There's nothing good here for Super-Cs. Even for our current travel trailer, we drive all the way to Dalton for service.
Your best bet for service is driving to a dealer in AL, FL, TN, or SC. The Camping World in Woodstock is decent, but they are very slow to do anything with waits of 3+ months common. Even if they had a Magnitude or Omni in stock, I would avoid buying from them - we got a lot of runaround with sales, and ended up buying our trailer elsewhere after we got fed up with their shenanigans.
We've driven to SC and AL over the last week to look at 4 different super-cs and think we're going to end up in an RB34. We'll have to drive 3 hours away again for it, but it's worthwhile to get the right unit.