Standard advice is to wait two full weeks, then bump your thread (or rebase the patch and send a v2 if there's new conflicts with the maintainer's tree).
Yeah, I'd just use whatever the output of ./scripts/get_maintainer.pl says. It will also suggest any recent committers to that area of the code, which I've found useful in the past. Usually I put the maintainers as To:, and everyone else as Cc:.