I have a somewhat different take on your situation. I have a much higher level of speakers but felt that something was missing and the center channel wasn't giving me the clarity of sound needed. It is not amount of amplification as I have far more than is needed. Where I found the problem was in the quality of the head unit (receiver) and I went through more than 6 different options before I splurged and bought the Anthem. With nothing else changing, the sound went indistinct to clarity.
Axiom: ADA1000, LFR1100, VP180, QS8, EP500, M3, M3comp
AudioSource: Amp One/A