The std Skybox - Pace manufacture - has one RGB output and one composite, for TV and VCR. What I have noticed is that the composite output (VCR) is much worse when main output is set for RGB. It has more digital artefacting - shimmering and motion ghosting than when output is set for PAL. The box is several years old, will a new box remedy the situation. Also using the RGB input on a Sony widescreen, the PQ improvement was not staggering.