Is there such a thing as too much power?

What I hate most in audio industry - when producers, sellers and reviewers are selling cheap stuff with expensive price tag and try to brainwash people that this cheap stuff is exclusive and expensive.
Audiophile you have to know -
Low sensitive speakers are cheaper to build compared to high sensitive speakers.
High sensitive drivers have bigger magnets and light cones made from more expensive
material compared to heavy cons and weak magnets in low sensitive drivers.
Also to build boxes for high sensitive speakers much more expansive.

@alexberger +1

Alexberger and atmasphere,

I also agree that low efficiency means more power is needed and this results in thermal compression (as the wire in the voice coil heats up, resistance rises).  That is why high efficiency speakers typically sound more dynamic and lively.  

The reason the industry moved away from high efficiency has a lot to do with the large size of typical high efficiency speakers.  That size became an even "bigger" issue with the advent of stereo and the need for two speakers.  Smaller speakers became a commercial necessity for stereo.

I dont still understand the arguments against LOL....

ALL OTHER THINGS BEING EQUAL (That is the part people seem to be missing) a higher power amplifier will always be preferable.  It will run less stressed and have much more headroom.

As for the higher distortion at lower levels of a power amp, even those higher levels of distortion is still well BELOW anyone's hearing so it is a moot point.

This thread is worth a read (you can get the gist from the first two posts). By following the instructions you can work out how much power you need. If you look at the poll results you can see that  >70%  indicated 25W or less with nearly 40% needing only 4W.
Power in itself is not a bad thing but assuming you are working to some kind of a budget then it would be best to find the highest quality amplifier that meets your needs within your budget. Power adds significantly to the production cost of a product (less so with class D) because some of the most expensive components within a power amp are the power supply and heatsinks the size of which are proportionately related to the rated output power.