Great review Amirm. As a result of seeing this review, I bought 3 LA90 for my 3 front Focal Kanta 2 speakers. I am running them in bridged mode with high gain. They are a lot cleaner than my ATI527NC which you reviewed—it was not even in the same ballpark. The ATI you measured at 99 while the LA90 at 120. I am surprised how dirty sounding the ATI sounds in comparison. That hash between 99db and 120 removed the richness of the music.
Do you think a Sinad over 99dB will be responsible of that kind of better sound? Let me doubt it.
I think you need to do a double blind test first with leveled gain, etc.