DVI>VGA These two are the pc inputs. The others are generally used for stuff like tv/sky etc. I'd say Component>S-Video>Composite. One thing ive noticed, is it doesnt seem possible to get picture in picture with the DVI and VGA, onlu DVI+one of the others or VGA+one of the others. Which is a shame as I only use the DVI and VGA for my main pc and server.