How many watts??

In reviewing your question, I believe you are focusing too much on the OEMs guidance for the speakers.

Speakers can be damaged by 'clipping' which can be done by an amplifier that is below the recommended wattage rating.

I have a VU meters on my amp and when playing music in the background when guest are over for dinner the amps rarely deliver more then 3-5 watts.  I prefer to listen to music loud when alone and staying around 100 or so watts requires my volume knob to be in the 60-70% of full volume range depending on the source and the recording.

Therefore, are you enjoying the sound?  When you turn the volume up or down slightly are you noticing characteristics change in tone, timber and tempo?

My current setup is YBA 1 stereo amp 85 watts and YBA1 pre amp feeding a pair of Salk ss- m6 monitors I believe they are 87db
  

Leave the room and go back in forgetting you ever heard about speaker wattage. If your system sounds good, there is nothing to worry about. 

What he said.

Big amps sound beefy, that is what they do. Your loudspeakers may not sound beefy even with big power. You can always borrow a big amp and try it, then you will know.