Well I had the chance to preview the M80's (2 front, 1 center and 2 rear) with the QS8's....during dvd playback the QS8's were not existent as the front 2 M80's over powered all other speakers...center speaker was as clear as I expected...no surround sound at all...bass (ep600) was boomy at best...wanted to turn it off....during music playback they were unbalanced with no imaging at all....improperly set-up I suspect.....subwoofer was boomy and over powering...not properly placed...I suppose for their price they are OK...but unfornuately I am looking for speakers that are more than OK for my hear....sorry.....they look good though...