I'm a little confused about recording to TV1 vs TV2. My newbie question: Does which tuner matter for my purposes? If I'm almost always using the 622 in the Single Mode (rarely need to be watching something different on a second TV), do I have any reason to care if an HD show is being recorded via the TV1 or TV2 tuner? I guess I don't quite get the relationship between the 1 and 2 tuners and the 1 and 2 outputs -- I understand that the TV2 out is limited to SD. Does that mean an HD program recorded via the TV2 tuner will also be recorded at the lower SD resolution? Or are both tuners functionally identical, with only the outs being different (which wouldn't matter, if any recorded program can be later sent to either out)? Does selecting Single or Dual mode affect the resolution at which either the TV1 or TV2 tuners will record?