I think I'm in a good position to answer the question. I've got an Aries and Vega, and I just ordered a CP-800 to replace the Vega after a home trial. My system is based on streaming FLAC files across my home network.
Regarding sound of (A) the Aries via USB to the CP-800 vs. (B) the DLNA port on the CP-800. I could not tell any difference in sound quality, through numerous trials. They sounded absolutely identical to me.
I was disappointed, though, that the CP-800 does not seek within a track (which most high-end stream renderers will do), and when changing tracks in the middle of a track, the CP-800 sent crackling noises to my amp and took a while to lock to the new track. Again, the Aries does this flawlessly. I'm keeping the Aries until Classe improves their DLNA operation.
Regarding sound quality of the Vega vs. the CP-800 DAC. They sound a little different, but it's difficult for me to have an overall preference. The Vega at its best can sound a little rounder and less "electronic" to me. (YMMV!) HOWEVER, I often have to run the volume of the Vega below 40, and I find the sound a little less convincing then. And also: when I played a few vocals on the CP-800, they sounded quite marvelous. So I would call it a draw.
What sold me on the CP-800 are the analog volume control, the tone controls, the parametric EQ, and the bass management. I use subs to even the bass in my difficult basement room, and I can't think of a better way of doing that than the CP-800. Thus, the CP-800 can produce better balanced sound in my room than the Vega. I listen to string quartet music, much of which is recorded harshly, and it's wonderful to have the tilt control at hand. So for me, the CP-800 is a winner.
I also like the app.
I hope that helps.
Mike
P.S. New here: this is my first message on Audio Aficionado.
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