I'm sure this question has been asked here a billion times, but searching the forums got me nowhere, so forgive me if this is a recurring question. I'm a very happy owner of a pair of original QS4's (with a pair of M60 V1's for fronts and a Mirage center channel)and am wondering if I would see significant improvements if I were to upgrade my surrounds to V2 QS8's? This is for a mid-sized room, and the surrounds are mounted on the side walls about 3 feet behind the listening area.