Favorite mid-tier streamer

Another to add, only because it is the one I use every day: A Sonore Optical Rendu, which is fed by a Small Green Computer i5 Sonic Transporter. I find the whole thing pretty effortless to set up and use (and I am a technological moron). Played through my Ayre QB-9 Twenty DAC, I am relaxed and engaged while streaming music. I use Roon through my iPad, and the whole user interface thing is easy and intuitive (I know, that's the Roon part, not the Sonore). 

You can do it under your budget...

Eversolo has all the top components in it.the just came out with version 10 3.5k.read the reviews on a8 version.another bang for the buck

The Aurender A1000 is a much better value than anything Eversolo will ever produce.   Ever pick up an Aurender?   They are built like tanks.   

Anyone spending $3700 on an Eversolo has really fallen for the hype.   Wait until their hack FW has left you without USB or dropouts with Tidal.  Forget about reviews , go to Zidoo website and see all of the problems they are having.  Good luck.

Sonore Optical Rendu or Ultra Rendu.

The sound quality of the PS Audio Air Lens is great. No idea what RP is. Though Air Lens does not have a software like Sense or Roon, so you use for instance Tidal Connect or a separate device housing Roon.