What are the best GaN Amplifiers available today?

So far nobody has produced any concrete evidence that any product discussed is the best. Just more this one sounds good or better to me judgements, which are fine but everyone has an opinion. In that case it just boils down to who do you trust most to help make a decision and then what products do you decide to try based on recommendation.

I’m with @atmasphere in that my experience tells me I can typically correlate good measurements with resulting sound to a useful extent. It’s never a 100% guarantee but I find it good enough to help me make better informed buying decisions. Of course in the end one cannot know what any one component is capable of until it is heard doing it in a particular system. Even then the resulting sound is always a team sport among the gear in play, the room, annd even the ears listening and some teams will perform better than others even if perhaps a superstar or two are in the game.

@mapman 

In the 1980's all the best measuring equipment was supposed to sound the best and now we know that was not true, maybe in 20 years all the current best measuring equipment will not be considered the best sounding equipment.

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@invalid, when I look at measurements, specs, or other objective information, I’m looking as much if not more for red flags ie clear problem areas as I am which measure best. I don’t necessarily need the best measuring thing but I definitely do not necessarily want to pay top dollar for products that have demonstrable flaws or even are not able to justify the asking price objectively.. Nor do I want to pay top dollar for advertised abilities (specs) that don’t measure up. That’s just me. Lots of factors to consider including operational features desired for a particular application. Lots of things sound “good” to me. What is harder is to make smart decisions that maximize value. The bigger the investment, the more careful I will be in order to justify the expense. I think that is a relatively normal thing to do.

Just buy all the stuff ASR approves of then, measurements don't always correlate to sound quality, some equipment that doesn't measure good can sound very good.

@invalid No need to be so absolute. I’ve bought many items just because I had a chance and liked what I heard. I’ve also heard many things that sound uniquely good but don’t measure well. If you can’t hear something you have to go with whatever info is available In order to be able to make an informed decision. Otherwise it’s pure guesswork and the chance of expensive mistakes goes up.