I just compared my new Tivo HD video quality to my 8300 HD. On HD channels (QAM on Tivo only right now as I do not have cable cards yet) the quality is about the same. On SD Channels the video quality of the 8300 is much better. I made sure all video settings were the same for both inputs, although 8300 is connected by component connections and Tivo is connected by HDMI. Will SD quality improve once cable cards are installed? Will Tivo always have lower quality SD? Anyone else noticed this?