Through DirecTV you are only getting about 5 HDTV channels. 2 HBO, 2 Showtime and HD Net. The rest are upconverted standard definition channels and will not be nearly as sharp. To get HDTV at all you have to run the component video cables from the DirecTV reciever to the DTV inputs and that is all for the picture (no s-vid needed) and RCA audio cables for sound. Hopefully you are using good quality component cables like Monster Cable, this will make a difference. If you have local HDTV broadcast you can get it using a UHF antenna and the DirecTV box through the same cables.