Spring Valley will be solid, but I see the 4A championship coming out of the Upper State this year. NW will still be good, Irmo should be better, and LEX, Mauldin, and Dorman should all contend for the championship.
With regards to 3A, unless Eastside has a major breakdown in the playoffs, I see them going to the finals and thumping any team that the Lower State has to offer. This would include Socastee, no matter how good their forwards are.