I'd very much like to see an option for NOS of RedBook CDs/WAV files. I very much like the way Audio Note (UK) does this, but i gather it would be impossible to implement the "no-filtering" approach of AN(UK) in an Asynchronous USB environment. My big complaint with my Wavelength Proton/Neutron is that it is, for lack of a better term, "sharply over-realistic" and i don't feel as drawn into the music on my DNA Stratus with the MacBook Pro + Wavelength DAC as I do with my AN(UK)CD 4.1x.
I realize that a lot of people like the sound of "modern" DACs, and I don't dislike it, as much as I simply prefer my AN(UK) digital front end for the way it draws me into the music,whereas the Wavelength DAC makes me feel like an observer of the music.
I'm told we'll never see a USB DAC in AN(UK)'s line-up, with the exception of the Zero series, where it has been added to make it more versatile to a wider audience