Which is supposed to be superior picture quality? RGB or S-Video? I was always told RGB, but when I tried it (setting my DVD player to RGB, using a 21-pin Scart to conect to a RGB-enabled Scart socket on the TV), the picture was a lot duller than when I use S-Video or composite. Am I using the correct Scart cable (it's a 21-pin IXOS) or MUST it be a dedicated RGB cable? Is the picture improvement with RGB supposed to be noticeable or only slight?