Class D amps that are superior to all or most?

No, You didn't, here's what you said:

However, the driven device forms part of the output filter and thus effects the frequency response.

In this case its hard to construe the FR being different from the bandwidth because we are talking about the response of the amplifier in its upper range and how its affected by the filter. But no matter: neither are affected if the amplifier is running sufficient feedback.

Facts are

Everyone likes what good Class-D’s do in the bass on loads that are not too severe, but many hear some thing not quite right with Class-D in the upper mids/highs with many speakers, and this is it’s Achilles heel.
Technics (SE-R1/SU-R1000) claim to get rid of it by making the switching frequency 3 x higher, 1.5mhz, so that then the output filter is also 3 x higher and therefore it has little or no influence down into the upper mids/highs.
Most Class-D’s that have around 600khz switching frequencies, have output filters that have effects down into the upper mids and highs.
And yes throwing a **** load of feedback may fix it, but the best amp "theoretically" would be ones that use no feedback if it can be done without distortions, or very little or local not global.

Cheers George

@ricevs -

I have only seen the blah Herb Reichert review of the LKV (says it beats an old class D amp and is somewhat competitive with a $3500 Rogue tube amp). Are there other reviews? 

This is the Herb Reichert who in the latest Stereophile said he likes harmonic distortion in his amplifiers. It's no wonder he didn't like a class D amp -- most have vanishingly small distortion.

It’s no wonder he didn’t like a class D amp -- most have vanishingly small distortion.

 They have other problems also, like the Ice-Power’s 1200AS2 that has massive phase shift from it’s output filter way down into the mids (red trace) https://ibb.co/J2Hns7s and also (blue trace) a sharp rising output impedance starting at also at the same frequency as the phase shift does. Sure throw maybe a **** load of feedback at it and it could fix it, but to what other detriment.

Cheers George

George, 
How many times have you posted this info?......a million?  Yet, Michael Fremer thought the stock module to be quite good (read the stereophile review of PS audio 1200 amps)....he did not think the mids and highs on the $6K monos were quite as good as the $150K Dartzeel.  The modified IceEdge amps I sold are raved about sonically.  Then there is the about to be raved about by Doug Schroeder (stock versions from Legacy)......calling it a Tsunami.....he he.  He likes them better than big mono blocks from Pass.  So, with all your postings....it seems to have very little to do with the sound....yet, you keep harping on it.  The only ones that really know about something are those that listen.  You don't know anything about how a stock or modified IceEdge amps sounds....you only keep posting some spec you do not like. I personally do not care for the stock IceEdge module....but once modified, it sounds really good.  The IceEdge module will never be state of the art......it has flaws......including maybe those "bad specs".  But once modded, it sounds really GOOD......and you can have a dual mono stereo modified version (remember.....1200 watts into 4 ohm.....drove the Alexx speakers fine) for a little over $2000 delivered to your door.