I recently posted a D-25 here and it sold fast. They don't come up too often, but I'd say you'd be pretty hard pressed to find a better built and better sounding portable CDP.
In his review Steven R. Rochlin from "Enjoy the Music" decribed the sound as...
...gorgeous. To expand on this, glorious. To expand further, very defined and tuneful bass with highs that not only sound good, they are very smooth and clean. As for the midrange, at times I wonder if there isn't some small mesh plate 300B hiding within this metal case somewhere. Add to this incredibly realistic harmonics and a front soundscape so deep that it makes me rethink the possibilities.
Disc after disc I sat there is awe. Not just through headphones, but also within my reference system. In fact it is within my reference system where the soundscape depth and amazing 3D ability shines... The D-25's inner resolution is amazing using my new reference headphones (Shure E5c).