You might consider waiting for the Schiit Yggdrasil DAC, whenever it's released. External interpolation filtering (18K+ taps) via DSP programmed algorithm and discrete multibit (R2R) ladder conversion, I have fairly high expectations of it, relative to its price point.
The Centrance M8 is a well sounding DAC/amp, but its basic claim to fame is the substantial power available for a portable rig to drive most if not all dynamic and planar headphones.
The DA8 is really good, it's a shame people get put off by its Chinese pedigree. It uses a Sabre chip, but it seems to have been voiced towards the warmer side of neutral to give it a more natural tone while still maintaining the microdetails and air that the Sabre is known for. IME, it has been able to avoid the glare that a lot of other sabre implementations seem to have. You also get DSD support if that's your thing. Though, the Yggdrasil has still piqued my interest and I will keep my eye on how that shakes out.
Edited by EraserXIV - 7/21/14 at 11:43am