Picture size I use Comcast cable service. What is the correct setting on the tv for picture size? It is set at 16:9 now. The non wide screen broadcasts have black bands on each side. I can stretch the picture, but it than distorted. The cable box remote allows normal, stretch, zoom etc. but again anything other than normal produces distorted pictures or cuts off full display on top and bottom. What settings are best for tv and cable box? Any help would be appreciated.