Can you do an Alcons system (7 speakers plus subs) for 15 to 20K?In that price range i would seriously consider Alcons Audio CRMSCompact. Perfect movie and really great music speaker system if the minimal design does not bother you. Also the wide dispersion pattern up til the 20khz at high SPL gives you nearly always stereo music in the room when driniv only L+C.
one drawback - bit noisy amp.
undoubtful one of the best systems money can buy.