@kiwiscott - thank you for your response. Simplicity for me is just what you said: sitting in the corner listening to beautiful music and not thinking about upgrades. (your warning about having to upgrade in 10 years is not something I worry about as I am 78 ((a young 78)). I am not, like most people on this forum, an audiophileI as I have neither the hearing nor the musical appreciation and understanding that most people here have. What I do love is sitting and listening to music such as scores from movies like Out of Africa, Cinema Paradiso, Gladiator, etc. Or vocals, mostly female, think Nina Simone singing Wild is the Wind. I could sit for hours listening to that kind of music. But what I mean by “simplicity of operation“ is more than just not having to consider upgrading, it’s even simpler than that: I am, as I mentioned in my original question, terrible at operating technology. I actually have bought a couple of headphone amplifiers which I have not yet used because of that. (Eventually I will find someone to show me how to use them).
So I would likely buy the Naim Uniti Atom if I went with a one box solution, But I’m just concerned that because it has so many features it might be too difficult for me to operate. Additionally, I don’t need most features because I will only be using it to stream directly from the streaming services such as Tidal, Quobuz or Amazon HD (I will not be using it for a phono, CDs or streaming from my own files as I will have none). I have considered the Powernode because it seems to be the simplest, but my concern there is whether I would come close enough to maximizing the luscious midrange of the Graham LS 6 speakers. If it would that might my first attempted solution. The final choice would be to combine the Node (again because its ease of operation) or one of the other streamers suggested by others on this thread, and combine that with a good quality integrated amplifier which is where I probably am at the moment (subject to change in about a half hour).
Again, thanks.