Headphone King of Soundstage?

I've really never heard a headphone that could portray soundstage. How could it? The sound is in your head.

I am also curious how 800S headphone turn out in soundstage.

Let me see what happen next Monday.

I own and listen to a lot of headphones.  I have to be honest, "soundstage" is not something I've ever bothered to think about when listening to headphones. 

Listening to headphones is a completely different experience than listening to speakers.  Not only are you surrounded by sound, but you often have a visceral sensation of the sound waves, even at lower volumes.  With headphones you have two little speakers right next to your ears, so you can't have that same immersive experience. 

There is some trickery that can be done, for example one of my headphone amps has a "crossfeed" circuit to send some of the right signal to the left side and vice versa to help simulate "spacialization" and reduce listening fatigue.  I've never used it. 

I have the HD800 and they are fine headphones, and from what I've read, HD800S may be even better.  I bought my HD800 second hand, so I can't speak to break in.  

If you want the sound of speakers, listen to speakers.

The only phones I've heard that produce "out-of-head" sound are the old Stax Lambda Pros, whose drivers were situated slightly in front of and aimed at the ears.