And based on my Tivo's behaviour, I'd have to say "Repeat and First Run" (that's what it calls it). I bleieve "First Run" is always "First Run", regardless of whether you've seen it, but I could be wrong (and probably am).

I do know that selecting "Repeat and First Run" won't hurt you. If the shows are sufficiently described to Tivo, Tivo will only grab one instance of a particular episode. So, when they start airing episodes, if they play the first one during one part of the day, then air it again say at 3AM, Tivo will only get one of those episodes, whichever one doesn't have a conflict.

In fact, I just noticed that only with Tivoweb can you choose to grab all instances of a show, every time it airs. At least that's what I'm seeing.