MiniDSP SHD Power if you only need digital inputs (AES/EBU, SPDIF, and TOSLINK) and network streamer.
This is a review and detailed measurements of the multifunction Minidsp SHD Power amplifier with Dirac Room EQ and general signal processing. It was kindly sent to me by a member and costs US $1499 including a measurement microphone. The SHD Power has a muscular look and feel to it: I like...
www.audiosciencereview.com
If you need analog, would need an external ADC.
The DAC and DSP are SOTA (my opinion since that isn't a well defined term, I'm sure everybody has their own definition!) The DSP in these game changing and is comparable to very few products available. The ones that do are either not consumer, or very expensive.
The amp is really good, perhaps not SOTA.
Comes with a DIRAC license.
The only drawback I see is the 1.7V output. This may be an issue, you should make sure the amp you have has enough gain to be driven to full volume at 1.7V.
MiniDSP has excellent application notes too:
miniDSP is a leading manufacturer of Digital Audio Signal Processors for the HomeTheater, Hifi, headphone and Automotive market. Join our large community of Audiophiles, Engineers and DIYers using our innovative products.
www.minidsp.com