I BIAB, and I tried all kinds of things -- bazooka tube, tea balls, hop sacks -- to keep the wort clear. Now I don't bother at all. Just dump it all right into the wort. I brewed an IPA with 8 oz of pellet hops the other day, and just let most of the goop settle and poured the rest straight into the carboy. Lots of trub, but beer was perfectly clear.
Er, to clarify, that's for filtering hops out. For the BIAB part, I just use a tulle curtain sewed into a bag.