I used Micah Williams photography www.micah-williams.com for my engagement photos and they turned out great! She doesn't own a studio and does on location stuff. She is a newer photographer so she is willing to work out individual deals for clients....she did my engagement photos super cheap and gave us all our digital images on a CD with all of the rights! You should check her out.
Theres also another photographer in Alpharetta that I like, but i can't remember her name...if i think of it, I"ll definitely add on here too!