FWIW, I have a Pro-ject Stream Box Ultra S2 streamer that has sounded quite good. I got it as a "starter" streamer, but have compared it to an Auralic Mini streamer and a $8.5k Naim NDX 2 used as a streamer. I’m sure there may be differences in sound quality between streamers, but couldn’t hear a difference in sound between the Pro-ject and the Naim used as a streamer.
I do like the really small size of the Pro-ject streamer. The fact that it fits nicely on one shelf with my DAC takes away one of the big drawbacks of having a separate streame and DAC for me.
I also think that streaming standards are likely to change over time so I think that there is merit to keeping the streamer separate from the DAC. I do like the simplicity of integrated audio equipment when I think standards are less likely to change such as for integrated amps.