Two speakers hovering over your ears is basically what the K1000 is. You can try a ghetto version of this by holding two desktop speakers next to your ears. Itsa very good effect. That natural crossfeed makes listening a lot less fatiguing than when listening to headphones that are playing sounds on just one ear. It hurts, really. That's another reason why Dolby Headphone is so pleasing to me. You get that virtual crossfeed.
I would just go for the Sony MA900 for that effect. No need to spend ~$1000 on the K1000, which I have a feeling probably got an instant overhype boost as soon as it became discontinued.
I had the MDR F1 and it had the same natural crossfeed effect. The MA900 is supposed to be an improvement over the F1.
The problem with those types of headphones is that they aren't great for Dolby Headphone and handling HRTFs. They already have a diffuse sound and sound similar to dolby pro logic in stereo. Something like the AD700 becomes razor sharp when put into dolby headphone, but the crossfeedy headphones still sound a little fuzzy in imaging. They sound cool though, sort of holographic, just not super sharp. I like them for movies.