Does any one know which is the best signal, or what the difference is between the RGB and Component signal when sent via HDMI?
Good Q! I've been told that YPbPr is the best (by retailer). I tried RGB over HDMI and my PJ didn't like it at all!
Best is the one that works or the one that looks best to the person viewing. Susequently, only you are able to determine which is best. If you want to know for technical reasons, the previous considerations make it a mute point IMO.
Y Cb CR is what is on the disc, RGB is what the display works in, so by changing this setting you decide which does the Y Cb Cr to RGB conversion, so this will depend on the screen.