I live in east Cobb county, just next door to Roswell. It's a very safe area with great schools. Roswell itself is nice as well. My biggest piece of advice would be to try to live as close as you can to where you will work in order to minimize your commute--traffic down here is ridiculous!
I live in East Cobb County, about 5 miles or less from Roswell. I would agree with you, the schools here are very good, the healthcare is excellent, services are excellent, standard of living is excellent. Interstate 75 cuts Cobb County in half, on the diagonal. Everything above I-75 is pretty much East Cobb. Everything below I-75 is either South Cobb or West Cobb. Having lived and worked in both ends of the county, I would choose East or North Cobb. South Cobb has always been in transition since I moved here in 1981. The better schools are in the north and east Cobb county. Home prices are also higher in the north and east,but those homes seem to hold their values better.
Cobb County is a very nice place to raise a family. It is traditional and conservative, but not provincial. You will have neighbors from all over the country and around the world. My own neighborhood looks like a little United Nations. We have people here who came from Mexico, Chile, Russia, Nigeria, and Korea, as well as good old Americans. Almost everyone in Cobb County is from somewhere else. They call us Tree Huggers, because we get transferred in with our new jobs, love it so much we grab on to a tree and never let go!
I am thinking my best bet might be a 6 month lease until I get the "feel" of the area/
Thank you for all of your advice, I have an interview at the end of July, wish me luck!!!
That's exactly what we did when we moved here. We knew the general area we wanted to be in and got an apt with a 6month lease so we could try it out. At that time DH worked in Marietta so we lived in Marietta. Later we found a house in East Cobb.
Eventually DH had his office moved out to Alpharetta, which was about a 45-60 minute commute each way. Here in the metro area, we don't say how many miles to work. It's not "12 miles", its "45 minutes."
Commuting is the big hassle of life around here. Everyone has at least some commute. I work in downtown Marietta, about 5 miles from my house, but it's a 25 minute commute. Just depends on traffic flow in your area.
I would suggest that you get an apt reasonably close to where you work. Then you can scope out the traffic patterns and ultimately decide if you want ot move farther out, north, west, east or whatever. You will have to decide how long a commute you can live with. I have worked with people who commuted 90 minutes each way and thought nothing of it. Me? 30 minutes is about my limit, so it was a little bit of a trick to find something that suited me within that time-frame.
Good luck with your interview. I think you will love Georgia. It's quite temperate here, meaning that we have 4 distinct seasons. We don't usually have too bad a winter(this past winter excepting) and summers are warm and humid, but not usually awful. Everyone has A/C and we're not afraid to use it.
My last winter coat lasted me for 15 years because I only wore it about 14 days of each year. Otherwise a good jacket will do.
Welcome to the Deep South!
I have a 30 mile commute to the Perimeter area of Atlanta and without traffic it is easily 30 minutes but on an average traffic day it is at least an hour to an hour and half. The record so far for my commute was four hours! 
I would honestly try out the commutes first traveling from neighborhoods you may be interested in, and then decide on other factors like cost of living in the city/county, school system etc. after that. What fun is living in the best area if you spend more time in your car than enjoying your community? I wish I could ride my bike everywhere...so we are looking at moving closer to the city.
