Tell me if ive got this straight. Ive noticed tv's having both the ntsc and atsc tuners. NTSC being for hdtv and ATSC for standard cable. Without the ATSC tuner you wouldnt be able to receive cable out of the wall with out a box? Without the NTSC you wont be able to receive off air HD channels again without a box or cable card? So is it that even though a tv has both tuners, standard cable looks bad on a HDTV because the HDTV has to create info to fill the void in lack of full signal?(scan lines?) Thanx alot in advance.