Having the M5OWs as the rear surrounds is a sound improvement over the QS10s in my room. I went through several movies last night and having the monopole speakers firing right at the listening position was a major boost in directional sound. In all fairness the QS10s don't have the optimal set up in my room because the walls aren't up and there is nothing for the sound to reflect off of. I should have an opportunity to hook them up as rears this weekend.