All of my TiVo experience so far has been with a satellite-based service where my TiVo recorded the digital bitstream directly from the satellite. There was no need (or ability) to choose recording quality/capacity like in the stand-alone units. Is the same thing true for a Cablecard-equipped, stand-alone TiVo (Series 3 or TiVo HD), or will I have to make recording quality choices? Is it dependent on the channel being recorded (analog or digital) with digital channels, perhaps, being direct bitstream recordings but analog ones being handled differently? I'm getting ready to go HD, and must dump my satellite service since they no longer support TiVo. My only logical choice is a stand-alone TiVo with Cablecards, and I'm trying to get a handle on how much hard-disk space I'm going to need.