Thanks for sharing your thoughts. I guess if I already have the N3AP there's no need to go for these?
Don't have N3, but I have M9 and Z1R and find MH755 still enjoyable. Tonally, MH755 sounds like a Sony, it has more subbass than M9 and is more comfortable to wear than Z1R. So there are scenarios when I pick MH755 over the other two.Definitely, N3 is much better in technicalities, fit and build. Tonally it is a bit different, more L shaped and smoother than the harmanish MH755, but once you have heard something better, no point getting a downgrade IMHO.