Is there such a thing as too much power?

The brand names of the amps would be helpful and perhaps significant.

Depends on the quality of your amp.

Answering your title question...NO!  You can never, ever,ever have too much power!!  You just have to be careful to never overcrank the volume control.  Always keep your system well fed! (quality and quantity)

OP seems to imply that an amplifier's contribution to SQ is theoretically solely based on watts and not circuit design and a bazillion other factors.