DVRs capture digital cable signals just as they're delivered and viewed; there shouldn't be any difference between recorded digital cable (SD or HD) and the original. If a recorder is capturing an analog signal and has to digitize it first, there are more chances for video errors, especially if the analog cable signals are poorer quality. Comcast and other cable firms are in the process of digital simulcast conversions--duplicating analog signals in a digital format and sending both formats to subscribers. If DVR-captured digital video differs from directly viewed digital video, something's haywire with the DVR. I'd investigate how many cable channels are available digitally, if any, and how many are analog only. AFAIK, the latest Motorola STBs/DVRs as well as the Scientific Atlanta model I'm now using do a great job at capturing (exactly) digital cable signals. But my cable system completed digital simulcasting several years ago, so everything I capture on my current SA8300HD has been digital. -- John