Sorry, forgot to mention DLB. Gotta have dual-live buffers. There are times, such as when you have a show that ends after a series link cut off time, when that would come in handy. With a Tivo, if you were on one tuner, and a show was being recorded by a Season Pass on the other tuner, and the show ended late so that the Pass didn't catch the last few minutes, and if you happended to notice that within the next 30 minutes and nothing else caused that tuner to change channels, you had the chance to switch to that tuner and capture or watch that last few minutes. Or sometimes, you would want to simply change to the other tuner to catch something it just happended to be on it, perhaps on a channel that tuner was on because of a prior scheduled recording, and you'd be able to record that show, at least going back for the last 30 minutes and going forward. Channels like Discovery, History, etc. have many shows that might prove interesting and let's face it, you can't spend hours studying the guide to see what's on all the stations out there. Sometimes there's stuff you run across by chance, when you have two independent tuners you can see, select and control. So, basically, it's for those serendipitous situations, where you just chance on something, rather than the planned recordings that we can of course pre-schedule in the HR20. And sometime, you just want to pause the show you're watching, quickly switch to the other tuner to check some other channel and go back quickly without having to screw around with first recording the current channel so you can switch the other tuner, and then having to stop the recording if you want to change to something else or don't want that show preserved. With Tivos we often would look at the banner to see what was on the other tuner without actually switching to that tuner, thereby not interrupting the current show we were viewing. It's just convenient to have dual live buffers. Yes, are we surviving without it, but we could also survive without a DVR, perish the thought. We don't want the expense and inconvenience of multiple DVRs in the one room; Not a very practical alternative.