I went with the top of the line from Sonore and Small Green Computer. The Sonore Signature Rendu SE optical is the streamer and it runs ROON which is fabulous. I avoided Aurender because it does not. SGC built me a server with 10 TB of solid state memory. Andrew at SGC was happy to work with me to custom configure my server. It has an i7 processor, and a built in Teac drive to rip CD's. Nothing rips SACD but there are services that will do that. (or so I've heard...) This rig was FAR Superior to my MacBook pro! Also the support from Sonore and SGC has been great. The software running then is very intuitive. USB is the preferred output on many servers and DAC's. Lower cost options are available like the UltraRendu or Optical Rendu and less advanced servers from SGC.
Innuous and Antipodes also make great products, as does Lumin, especially the X1.
Innuous and Antipodes also make great products, as does Lumin, especially the X1.