Risk using amp Wattage than speaker rating?

The only real issue is if you have teenagers, or children with access to the stereo.
Or have drunken wild parties in which you tend to wake up not remembering what happened..

If some fool flips the volume way up and you have an amp which can far exceed the recommended wattage, your speakers are at risk of being destroyed.(in seconds)
If you are the only person using the stereo, and you never get so blotto you forget who and where you are.. then you should be just fine with a high powered amp.

However:
Even a casual idiot you show your stereo to, and you walk away even for a moment that person can just reach down spin the volume and in five seconds blow out your speakers..
Or, a electronic fault an INCREDIBLY LOUD bang, and your speakers become toast through no fault of yours..
Just so you are aware of this... and take precautions... no problem.

Well, no need to be a fly on your wall, Elizabeth.

It is my understanding that it's distortion that blows a speaker.
As long as the amp is putting out clean power you would be fine.
I used a Classe ca 300 which puts out 600 watts into 4 ohms & 300 watts into 8 ohms my 104/2 speakers sound great with no issues what so ever.

Elizabeth... no, I wouldn't be too concerned with anything you mentioned. Sounds like you've had a few bad experiences though!

Thanks for input Molocka12

I'm sure Elizabeth can handle a little levity. But all kidding aside, It is very easy to slowly fry your drivers too. It may still sound clean even though the amp is seriously clipping. In this case you won't end it with a bang, but turn it on the next time and the voice coils could be warped and rubbing or output is way down because a short has welded the coil in places. 30 years later, I still have a grudge against NAD for burning up my beautiful B&W DM7's in exactly this way.