Not to throw a whole load into this.. but have your thought of getting the better QS8's and then look for a cheep center speaker online to augment? I know that many of the newer movies have moved to using the center channel as a full effect full sound speaker, but for a $25-30 experiment.

Anthem: AVM60, Fosi DAC-Q5
Axiom: ADA1500, LFR1100 Actiive, QS8, EP500, M3, M3comp, M5