Good Power Amp for Dynaudio Focus

I've got Dynaudio Focus 220's/200c for the fronts, and some 110's for the rear. All of that was going to plug into a Marantz 8002--but I feel I'll be leaving some sound quality behind as well as potentially cooking the Marantz. The Dyn's are 4-ohm speakers at about 87-85dB sensitivity. The Marantz doesn't even claim (in print, anyway) to handle 4-ohm speakers at all--even though they will make that claim on the phone and it doesn't sound half bad to me, at least driving only 2 channels.

Anyway, I figured that a good 2-channel amp would take the heat off the receiver and give me a better 2-channel experience at the same time. I'm 90%/10% on the music/movies ratio.

For features and price, the Parasound A23 looks like a winner. If I did the math right, it could get to 106dB some 5 meters from the speakers (driving 2 channels). I plan to get a powered subwoofer soon, so that too would notch down my power needs.

Do these speakers deserve more power? Going to the A21 buys me about 3dB more output--but 106dB is f'in loud already, right?