BUT measuring all that at the end is BY THE EARS/BRAIN not by Tools working linearly in the time independant domain...
Sure. Make sure you conduct such listening tests with rigor and report back. Don't tell me you like the story from the guy who designed something. That is putting your trust in the hands of the wrong person.
Here is a story for you. Read what happened when Dr. Olive arrived at Harman:
http://seanolive.blogspot.com/2009/04/dishonesty-of-sighted-audio-product.html
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A Blind Versus Sighted Loudspeaker Experiment
This question was tested in 1994, shortly after I joined Harman International as Manager of Subjective Evaluation [1]. My mission was to introduce formalized, double-blind product testing at Harman. To my surprise, this mandate met rather strong opposition from some of the more entrenched marketing, sales and engineering staff who felt that, as trained audio professionals, they were immune from the influence of sighted biases.
[...]
The mean loudspeaker ratings and 95% confidence intervals are plotted in Figure 1 for both sighted and blind tests. The sighted tests produced a significant increase in preference ratings for the larger, more expensive loudspeakers G and D. (note: G and D were identical loudspeakers except with different cross-overs, voiced ostensibly for differences in German and Northern European tastes, respectively. The negligible perceptual differences between loudspeakers G and D found in this test resulted in the creation of a single loudspeaker SKU for all of Europe, and the demise of an engineer who specialized in the lost art of German speaker voicing).
So be very careful in believing what a designer claims.
And once more, listening tests are wonderful. Demand that your supplier show such controlled listening tests. If they don't have one, clearly they are not valuing listening as you say. Instead they want you to be believe written words with no verification. Caveat Emptor!!!