But, I don't think much will be effected in this project.
Sorry for the pedantry from someone who reads diyaudio often and designs high spec DACs on his own .
This is the tricky part with all electronics progression and forums, aspect pedantry and phoolery and working out when it is one or the other.
When someone comments on an aspect of your circuit, you have to work out do they mean:
* It will blow up
* It won't work!
* It will work poorly.
* It will work in an acceptible way for 99% of people.
* It will work fine, but I would do it differently.
* It is fine, but if you want special, trimming away at the 1%s and 0.1%s on functionality, you should...a, b, c.
* If you want a high-end, usually sold in $1000 professional versions and often completely and utterly pointless for domestic use... do x, y, z.
Audio is probably one of the worst areas for this. I have yet to have someone explain to me why people bother with greater than 44k and 16bit DACs. I can understand for "oversampling" filters etc, but not on the output. Not for audio. Definitely not for standard domestic audio. Your scope might be able to tell you the difference, but not your ears, even if you could afford a pair of headphones or speakers capable of reproducing the defects in the signal your scope shows.
For professional studio grade stuff, I can start to see reasons, to keep all the stages where digital must become analogue and vice versa as free from converter artefacts as possible. Though in those areas, how often does a signal need to be converted back and forth these days? If the signal is not digitally generated, guitars, mics, drums, vocals etc., Then probably once. If they are digitally produced, EDM etc. then it might never be converted to analogue and the first time you hear it is the only time it has been reproduced in an analogue form since it's creation.
So probably the only market for botique, high end DACs is the middle ground. People who want to produce professional grade digital recordings but have analogue equipment which require DAC-ADC or ADC-DAC chains.
EDIT: A similar argument can be made for lossful formats. TIF/BMP versus PNG, JPG. Or, video, YUV12, raw, versus Mpeg2, Mpeg4. For end of line user formats the compressed or even lossful versions are fine, but not so fine for intermediary stages. Some pro-video is saved as individual frames in uncompressed 32bit colour.