Our family goes to Goldstein, Garber and Salama. They are excellent. They literally have 'written the book' on cosmetic dentistry. Dr. Goldstein pioneered cosmetic dentistry, Dr. Salama is an orthodontist/periodontist and Dr. Garber is a sought after speaker and university lecturer in the field.
I would suggest going to see either Dr. Garber or Dr. Maha there. They will refer you if needed to anyone else on staff.
They are located near the Galleria Mall at Cobb Parkway and 285. They are well worth the drive.
An excellent orthodontist in Alpharetta is Dr. James Awbrey.