Your results with Magico speakers will vary depending on amplifier synergy and Magico model designation. In other words making assumptions that all Magico speakers sound bright and clinical with all amplifiers is not correct.
I listened to the A3 model with beryllium tweeter during a long demo driven by a smooth high end Class D amplifier and the sound was very good. Exceptional bass, smooth, clear midrange and treble, nothing overly bright or fatiguing.
The lack of cabinet resonance takes some getting used to but once you hear what it offers a conventional MDF box speaker can sound colored and veiled in comparison.
Overall there are speakers that I prefer more than the A3 in its price range but it isn't caused by them sounding clinical of fatiguing.
Another example was hearing the Magico S5 speakers at AXPONA audio show driven by Luxman mono blocks. The sound overall was OK, loud and powerful but inorganic and un-natural. Poor system matching.
The best I have heard Magico speakers sound was at a dealer in their showcase room featuring the model M2 speakers driven by a top of the line McIntosh system with two chassis tube preamp and 1KW mono blocks. This system had the best sound of any system I have heard. Incredibly clear and life like, literally extraordinary. No fatigue, clinical nature or excessive brightness at all. Too expensive for my budget but impressive sounding nonetheless.