I'm torn on buying a new sleeping bag. I do most of my camping in the North Georgia and occasionally North Carolina mountains, but take trips around the southeast states and even to the coast, most camping from spring to fall with little winter camping. Most of the reviews that I read for sleeping bags are by western campers who seemingly deal with colder temps more of the year and much more unexpected cold weather.
What are reasonable ranges for a bag that handles Southern temperatures most of the year? I'm shooting for March through October or November. And do I buy for the coldest temperature I ever expect to encounter with the bag, or shoot for an average temperature and accept a few cold nights wearing extra clothes? I'm indifferent to insulation or price at the moment.