I have heard the QLNs twice and they are probably the most fatigue free speakers I have heard. Unfortunately to my ears they were significantly low on clarity, detail, presence and energy.
Completely opposite from the Borresen X2 and Focal Sopra which for me swing too far in the other direction.
Consider auditioning something from the Spendor D Series if you can. Much more present and dynamic than the QLNs without the surgical detail of the latter.