Your math is very confusing.
M3v3 - 460€ / B&W685 - 600€ / B&W805 - 2000€?
I know i like the 685 on my amp, but if the M3's are even comparable with the 805's there are for sure with the 685'6.
i am definitly not an expert, but the fact that the M3's are half the depth en weigth of the B&W805 speaker does not question the quality?
I am not trying to find a point not buying them, i just want some info (maybe mis-typed, but hey english is not my mother language) I reside in Belgium.
I will play them on an old Technics SU-A700
I really do appriciate your comments and helping making my descicion.