I've recently purchased a new Panasonic 42" plasma and was wondering what the general thoughts are of the various "noise reduction" settings that you can turn on or off. My model has "PNR", "MPEG NR" and "3-D COMB". I've experimented with the settings on and off and, to be honest, can't see much (if any) difference. My DVD player is connected using RGB via SCART. So, what do you folks think? Is it best to use these "enhancements" or I am I best to leave them all off?