My Samsung T151 STB has selectable switch for the source (480i, 480p, 720p, 1080i). Given that different HD stations broadcasts in either 720p or 1080i, what am I supposed to do. Having to switch to 720p or 1080i depending on which station I'm watching seems silly. Also, since DVD is 480p, am I supposed to switch to that when watching a DVD movie? My TV is a 1024 x 768 plasma, if that matters. Thanks!