If Stratmangler's posts set your head spinning, and to me it could be written in Chinese, I would suggest either the Auralic Aries (already recommended), which is a streamer only.
The Aries Mini also has an internal DAC that may be perfectly up to your standards and you can sell your existing DAC. I believe the Auralic external PSU (cost £230) also fits the Aries Mini, so the whole thing would cost £680 with a good PSU. For £40 a hard drive will make it a network server as well. (The drive slots in under the baseplate.)
I have both units and they are both superb.
Best thing is you will be listening to music within 3 minutes of opening the box.
The Auralic Lightning App is absolutely brilliant. There is no knowledge curve at all with Auralic software, they have completely nailed setup and control. A 3-year-old could do it. The hardest thing is likely remembering your Qobuz password. It only works on iOS.
If Stratmangler's posts do make sense, then you are far more techy than me. I don't even know what 'headless' means, but it sounds edible.
Wilson, Luxman, Innuos, Holo May, Puritan, Garrard