Just checked in and saw your post. Atlanta's a great place - and the job market is probably one of the best, especially right now. Even though some companies are laying off, others are hiring.
As far as where to live - the popular places for singles are Buckhead and Midtown areas. The highest salaries are going to be downtown and Midtown, but as you know admin salaries can vary greatly even in the same area.
I live in the 'burbs (not too long ago, my area was rural), so I don't have a lot of info, but check out this website - pretty much every kind of information about Atlanta is available from this site: www.accessatlanta.com