You're so focused on your own conclusion that you're missing my point altogether. I'm not talking about 110db average levels, I'm talking about 110db peaks for a particular instrument being played a certain way. Frankly, I don't listen with 110db peaks on my system, ever. Well, just that once when I was trying to truly simulate my wife's drum kit, but that was it. If I get really rambunctious I listen to 102-104db peaks on well-recorded contemporary jazz, but the average levels are worst-case in the mid-high 80s, though my more normal listening levels are high 70s-low 80s, and with an 80db average I see peaks on the OmniMic in the 95-100db range, and mostly in the 90s.
My point is, PENG, that if you want to reproduce live music levels for some instruments, and saxophones and trumpets fall into this category incidentally, you're going to need more than 20W of peak power into 83db/w sensitive speakers. You can make all the fun you want of this and my statements, based on some measurements that you feel satisfy your own particular needs, and I'm only pointing out that there are other environments, systems, and considerations where more power is called for, and necessary to avoid clipping.