Thanks - I had overlooked that this model can do streaming spotify - and cheaper than I can buy the Fiio M9 as well. I'll see how I go with my friend's lg g7 phone, and the ES100 unit that I am bidding on ebay, and will keep this on the list of potential options. I also agree that the difference from my Nokia 8 phone output is likely to be marginal (and I'm not the best at listening tests, I fail to distinguish 192 mp3 from flac). So really, its just the buzzing/distortion when the sound gets super low that bothers me about the phone, and I am still flip-flopping over whether I should even bother.
I have the LG G8, and I believe you will be very impressed by your friend's G7.