Welcome! I live in Cumming which, despite the horrible, horrible name is a great place to live. Probably wouldn't want to go too far north though because traffic is truly insane around here, and a commute from northern areas of Cumming to Duluth would suck rocks.
Gwinnett county is probably your best bet, but have to be more careful about picking specific areas (more hit or miss regarding schools, traffic, etc.).
Around here you really want to be somewhat close to work if you can manage it. My 13 mile commute from Cumming to Alpharetta takes 20 minutes when i am working off-hours, and 45+ during extended rush hour times. When i worked 25 miles away, it was a guaranteed 65+ minutes if i didn't leave the house by 6am.