Buckhead has really nice homes, thats where alot of celebrities that choose to reside in atlanta live..i would venture to say that there are some really houses in your price range there, but most of the really nice homes are probably in the millions...
However i have some friends that stay in Dacula, which is not that far from Lawrenceville, and they live in a neighborhood in your price range.. think their home costed a little less than 600,000 and had plenty of space...around 3 bed rooms and a master bedroom upstairs, middle level huuge kitchenwith dining space, with a den, dining room, and another extra room, and then a GHUGE basement that was so large that they could still have a room for entertainment(pool table etc.) 2 more bedrooms, an office and another den.. so all in all about 6 or 7 bedrooms, 4 and a half bathrooms and plenty of room throughout the house..and their nehighborhood has a club house and golf course, pool, everything.. The only drawback is the actual distance from Atlanta..on a good day i can go from there to ATL in about 25 minutes but thats speeding up 85 North @ 80+ mph..I love the area though...