I think the K812 can play with the big boys (HD800, T1, D7000, ESP950, etc). It has the most spacious sound of any AKG hp. I can say it is at the level of T1 and HD800 when it comes to soundstage and imagining. Resolution, transparency is also as impressive as the others in this class. There is the AKG house sound that fans will love. What I enjoy most about the K812 is its ability to play at its potential without the use of a large $$$$ amp. A great DAC and decent amp will do very well.
I have noticed what Tyll is saying about the "tizzy" sound on some music, but it isn't enough to bother me.
Edited by HiFiGuy528 - 12/16/13 at 3:36pm