I'm in NoVa, but haven't looked locally for wheels. I'd suggest CARiD, Tire Rack, or National Tire and Battery online. The modification depend on what you are trying to do. If you're looking for off-road stuff there isn't much unless it's custom. If you look on some of the forums you'll see a bunch of suggestions for large wheels, lowering springs, and body work. Are you getting the factory hitch installed or aftermarket?