Thanks for the info about their forums, although I'd already found them myself, same as I found the forums here after first getting avast. Whether I'll be active there is a who-knows, but at least I'm registered and bookmarked it.
And no, I don't touch P2P (took out avast's P2P provider for that reason) -- probably the only thing I might be interested in it for would be videos, but not on dialup. And I infer from Tech's comments that without P2P, the default settings should be just fine.