I have the DirecTV Tivo High Definition unit. Very expensive -- supposed to be one of the best. I noticed that the few times I watch my shows on it, I get occasional stuttering in the audio. Happens for a few seconds, then stops. A bit later it may stutter a little more. Now....this may be impossible to answer because I don't watch LIVE TV to really compare.... Is the stuttering audio more inclined to be a result of the signal coming in or perhaps a defect on the hard drive? Thought perhaps someone might have an idea.