Is the SINAD worth the inconvenience and the cost though?
These are the questions people should ask themselves first i think.
I've tried (and still trying) to find something decent (comparable with pro interfaces in terms of declared performance) with capability of at least 2.2, balanced analog outputs and some setup options.
Looks like Anthem STR Pre is the best solution, and you'll need some streamer/source device to feed digital in (because otherwise you'll have +1 ADC)
If we need some HDMI connectivity, we are going to cosmic prices even with some "mid-fi" brands like NAD because multi-sub option is relatively new and these devices are expensive even second hand.
And if AVR/digital preamp is broken, you will lose everything. It's not like PC, when you go to the store and buy new PSU/RAM ...
The only good side of AVR/processor is convenience and usability. Sometimes it's crucial.
RME Digiface or a miniDSP U-DIO8 would work if you want to use multiple stereo DACs but that gets kind of messy.
IMO multiple stereo DACs is a so-so solution, until you can't apply single master clock for all of them.