hey, maruzen, you said that you use the Xonar Essence for your dt990s on 6 channel for movies? How does that work for you. Can this card alone handle these headphones? There's no way you can bypass your Xonar to your little dot tube amp and still have those 6 channels surround sound for the movies?
And once again, I'm going to have to say X2 to David's post about how crazy-good the dt990 do with dolby headphone and blue ray audio. Although, I don't really care much about the DT990's for music, today when i re-watched Jurrasic Park. Never have i been so petrified in my entire life. The thumps and chases with the dinosaur took engaging to another level. 6 or 8 channel surround sound is a must when you watch blue ray. It is a MUST !
I also tried the Senn HD650's which i absolutely love for music..... but for Jurrassic Park, they just don't possess the bass, wide soundstage and realism effect that the dt990 do really really good at.