Thank-you for the advice, much appreciated.
Listening to a variety of DAC options in my own (heavily compromised) room would be the ideal way to go, just limited options to do that. I feel a trip to the closest dealer with a listening room is the next best step.
Initial take on ASR was interesting, it supported my limited understanding of digital audio (they are just ones and zeros!)
Then had my mind absolutely blown with the very clear difference a different power cable made on the streamer of a high end system. Still getting over that one. And now coming around to the fact that every link in the chain can make a difference, some more obvious than others, obviously. A power cord on a streamer...honestly.