No, I prefer my amp because it can handle speakers beyond the simple benign impedance. If an amp is "rated" at much higher power output, but then falls apart when trying to drive the speaker that the much lower rated amp can handle, then Houston, we have a problem. And such a higher rated amp has no business ever to be rated as your status of King.
As for amps with wimpy output transformers, I have no doubt that some low-power SET amps on high efficient speakers would easily result in higher performance than my CAT amps. I notice that there is not a single SET amp in your list. And yet, these are often the most expensive and most highly coveted/respected amps in the audiophile world.
Comparisions are a great way to draw and learn from others' experience.
I could not agree more with this.
I would be interested as to what qualifies as a "harsh" speaker. A few "odd" speaker loads out there that are often discussed here include the MBL 101 series (low sensitivity), Apogee Scintilla (1-ohm load), Sound Lab (higher impedance in the bass). The CAT amps can be configured to handle the Scintilla load. And it is one of the few amps that drives the MBL speaker with aplomb. I don't think there is a single amp in your list that can match it with these three speaker systems. Oh, you might want to add the MBL 9000 amp to your list. 8-)