I don't like cans myself, for reasons others have mentioned. I want to hear and feel the music. The band should be out there, not nestled in my cranium.
So my baseline for reference is a nearfield setup using great speakers and a great sub, tweaked to perfection in the most OCD Audioholic fashion to the best of my abilities.
The oldest speakers in my quiver are over 30 years old, and it took quite a large amount of fussing with placement and rather extensive eq to even come close to providing similar results as the near-field rig with those (with some success, that rig rocks and images fantastically well).
Unless
@Opathy isn't telling us something, he seems to have lucked out compared to me, that his retro speakers reflected what he was getting from the Sennheisers. I think he's pretty much right in that his old TLS 50's are showing their mettle.
Cans have no room influence, and TL bass couples to the room in a uniquely effective manner, so I wonder if the Senn's somewhat reserved yet resolving bass response mimics what the speakers provide. Bass accounts for a large proportion of the subjective enjoyment equation.