The reason i mention bi-wire is because i recently purchased a set of airlocked naca5 jumpers and they weren’t cheap, they improved the sound in my speakers and it would seem a pity not to use them. The B & W 606 and the Fyne audio 500s both are bi-wired but not sure about the Kef Q350s or the Dynaudio m20s. Whatever choice i make, they all seem like extremely well made and all have a high reputation for high SQ. What is important though is that they have a good overall sound balance, that they are not too extreme in any one department. The music i listen to i don’t want to be tired out from it so no harshness or too much forward.