Jim what cable co. do you have? All the major ones were mandated to carry cable cards this past July 1st. Cable card lets you get all the channels you get with the stb from the cable co. with the exception of VOD (obviously you don't get their guide either as that's part of the box, some tvs with cablecard have built in guide in set though), but like I said you get all channels, analog, digital & HD as long as you subscribe to them. I have it on my set & am quite happy with it. I would say hd pics look as good as using hd box & analog/digital channels look even better then when using box. I also really like it because I can use my dvr/hd box to record anything & can also watch just about anything else I want (including hd programs).
Jon