I find the DA10 to be very neutral and revealing and slightly bright of neutral-sounding in the treble. It's great with headphones with a slightly dark sound signature such as the Sennheiser HD 650 or Audez'e LCD-2/3, but with headphones which are on the bright side, such as the Sennheiser HD 800, I find the DA10 contributes to things sounding a bit too bright and clinical. However, I have found that further tweaks such as recabling and the use of Amarra Hifi software can make the sound more engaging.
Yeah - I got my eye on the DA11 and I wonder does it display the same characteristics as the DA10? Or what has changed in the sound sig.