Well, it does not matter for some people, though I have no objection if people to follow this way, and we should thank you for any objective contribution and scientific data, but for me it's like "the only parameter is you, you decide what you think is the right for you"
Of course, it is your own music setup after all.
The point is that even professional symphony musicians, who work in the top symphonies and have spent hours every day making and listening to music over the course of decades - these people are clearly still subject to biases unrelated to the quality of the music produced. So when someone presents their experience as a musician, or as a person who listens to a lot of live music, or as a person who listens to a lot of different amps as their criteria for sharing with others which amplifier sounds better, there's ample evidence that their preferences may have been different if the tests were blind. It isn't just objective versus subjective, there's also the quality of the subjective evaluations. If you are going to put in all the money and effort to buy and test these amps, why not also make them blind tests so that your subjective evaluations aren't so easily tainted by "flavor of the day" bias?