Get the Dacmini by centrance, i use the Dacport to drive my DT880/600 ohm, the DT880 is pretty neutral and combine it with the Dacport which have a transparent, neutral, and natural sounding make the sound quality that produced more enjoyable
Note that the Dacmini is more superior both in technicality and sound quality compare to the Dacport
I already bought NuForce HDP as DAC. Now I'm thinking to add tube amp that can produce warm sound to 880.
Thanks for the input though :)