I just tried a few streamers because my setup changed due to one of my kids taking part of my system to college.
A lumin U1 mini w/sbooster into a Ps Audio strata as preamp feeding meridian g57 amp & ProAc 3.8’s sounded amazing- detail, tone & soundstage, liquid/coherent and musical. Loved it - but my kid took the ps audio.
I borrowed a Lumin D3 w/ internal power supply and used the pre outs w/loss less digital volume control into the same amp & speakers. Noticeably less musical, tone and coherent and a little fatiguing. I was a little dissapointed.
I used a node 2 into an audio refinement pre pro then into the meridan/proac set up and it sounded about the same as the Lumin D3.
I then used an Oppo Sonica w/ Mod Wright mods and external power supply direct into the Meridian and it sounds almost as good as the Lumin U1 mini. Just a little less liquid/coherent but also a bigger/bolder sound. This is what I am staying with for now.
I did spend 10 days with this project so all set ups had time to burn in. None of the gear was new in box and all had been very recently powered up. Using Quboz, Prime, Spotify, Airplay and network attached dsd.
What I got out of it was that an external power supply for the streamer and a quality dac are very important. The preamp is almost as important as the dac. At least at the $2k streamer price point.