I had the chance to try the sennheiser 800, it is nice to get more reference points.
They sounded very 3D something that can't be said about my DT880.
I think it is really good to have atleast two headphones that complete each other. In all honesty
it is very hard to have a headphone that have only strengths and no weaknesses.
For instance if you had the 3D sound in the DT880 you would most likely not have the very strong
instrument separation etc..
I am very interested in the AKG K812, they are quite new, but they have get amazing feedback so far..
the price is very expensive but I have only seen 5 star reviews so far...they are not comparable to the K701 and k702 series...
Regarding reference points, I have asked a store in stockholm to take in the Stax sr 009
Just for fun to listen to them, to get a new reference point, this is supposed to be the best headphones in the world without any competition that comes even remotely close. That only drawback with them what I have heard is that once you have heard them all other headphones you listen to will sound like total crap.. These are Electrostatic headphones which is very rare. http://www.wooaudio.com/headphones/stax/sr009.html