What's your ZIP Code? Keep in mind that if you live too far from Chicago, then, by law, Comcast cannot air Bulls, Blackhawks, or White Sox games on that channel.
Probably unofficial, but Chicago TV weather forecasters think the most southwestern county in Michigan is in the ChicagoLand viewing area.
I wonder if Berrien County is officially in the marketing zone for the Bears, not the Lions. Similar question could be asked for all the major sports. Perhaps that affects availability of regional TV sports nets?