Headphones as a nearfiled listening source?!...

It just happened and I`m impressed... prolly it was due to "
Psycho acoustics/Epiphany moment", tho... :)
"Headphones can provide great insight, but a top-flight pair of speakerswill typically match or surpass them"

Depends on the headphones in question. Top flight headphones will blow away even the most expensive speaker for detail.I have never heard speakers resolve better than them.
Prolly was due to the fact that you can’t get more near field than headphones.  Duh.