Is there such a thing as too much power?

Sure more power is better , for some speakers.  I have begun to gravitate towards higher sensitivity speakers along with higher quality electronics.   That recipe has worked well.  I have been using the same 40 w PP mono amps for five years with several pairs of speakers that are easy to drive . I love those amps and swap speakers out every now and then

I subscribe to the “First Watt” school of thought .