Lewm,
I couldn’t agree more, but it’s the degree of distortion that is really relevant in broadest sense. If you can’t hear it . . . Well. Just because something adds some level of distortion doesn’t make it bad - tubes anyone. (BTW almost all my equipment had tubes). Technically EVERYTHING makes a difference, the room being a major contributor, so whether you are buying equipment without EQ’s or with it ultimately the signal passes through thousands of capacitor, resistors, tubes (in some cases), and all the small lengths of wire interconnecting that stuff, the end result is all that matters. Many paths to get there, very few definitively wrong answers, because in the end it’s ALL subjective.