I have a Sun Direct SD Connection and planning to upgrade to HD Connection. I usually watch only SD Channels so I just wanted to understand if i change the set top box , does that improve the Audio/ Video quality of Non HD channels ? I know the new Sun Direct STB has HDMI Cables So if I use the HDMI cable to my full HD LED TV it should improve the clarity ?..Sun Direct customer care people are claiming that it will improve five times. Not sure please advice..