Solid State Power Amps

2×220W rms 8 Ohm, 2x 400W i 4 Ohm, all power is continuous rms  measured at 0.01% thd+N.

@gryphongryph This won't matter if distortion rises with frequency. It will cause harmonics in the region above the turnover frequency to be audible as harshness and brightness.

Put another way, THD is not going to be all that important if distortion does not rise with frequency. FWIW, 99% of all solid state amps ever made have a problem with this.

@sgordoxyz Is there a reason you want to spend that kind of money? Just because you did does not mean the amps you get would actually sound better. There is something called the Veblen Effect, in which people will spend more under the illusion they are obtaining greater value, which obviously isn't the case.

High end audio is not drive by price, its driven by intention- how much (or how little) the designer wishes to present state of the art.

For example there are class D amps that are less expensive than the amps on your list that sound a lot more like music. So I would consider casting a wider net.

JA: "The Focal will play loudly when fed only a few watts, my estimate of its voltage sensitivity being 89.2dB/2.83V/m. However, as fig.1 shows, the Sopra No.3 is a difficult load for an amplifier to drive, with a minimum magnitude of 2.75 ohms at 96Hz and a combination of 4 ohms and a –56° electrical phase angle at 68Hz, both frequencies where music can have high levels of energy. Because the magnitude is considerably higher in the treble, the speaker will sound brighter when driven by tubed amplifiers, with their typically high output impedances."

@hilde45 Its pretty clear that JA has no idea of what he's talking about. If the tube amp employs feedback (and most do) then there will be no brightness.