For power, the Anthem P5. It is reported that it can melt a fork without breaking down (you should not try to melt a fork, and in the occurance that one would try the protect mode would kick into effect to protect the load).
I wouldn't think the Parasound would sound "better", both are very well designed piece of equipment that should perform as neutral components not affecting the sound acoustics unless the limits of the amplifier are pressed. It is most likely the Anthem can dish out more dynamics at high SPLs than any of the other amplifiers listed.