Audiophile quality streamer/server-in-one without a DAC. Does this exist?

I too have a Bluesound Vault II and could not be happier with it. It does have a built in DAC that is decent but I use the digital out to go into a Cary Audio DAC-100t tube DAC. I would not call it he Bluesound DAC cool, but straight up neutral. 

With the Bluesound not only do you get a streamer, but it can also expand to handle your home theater with the addition of their soundbar, sub, etc. 

If you can find a Logitech Transport, buy it, with one caveat; mine is a bit rachitic - two seperate power-supply problems. It sounds very, very good, it's attractive and it's versatile. Mine runs a QNAP NAS with 2.2 Terabytes of music through an Arcam DAC with alacrity, something an Aurender N100H didn't do
It does Tidal, TuneIn yadda yadda. You'd like the original with the "Transnav" knob, but the SE is identical apart from lacking the knob, which is a 'damned handy way to find a particular bit of music quickly.  

You may want to have a look at Naim servers like UnityServe or UnityCore, the come without Dac.

I build the Music Vaults which are complete server streamers.
They are made in Colorado :>) www.musicvaultcat.com
They come with the worlds best customer service too.

OK, I'm even behind Josh in my understanding of all this. Does "app" mean you have to have a smart-phone or iPad to control your music server? What *is* a music server? We have about 2,000 CDs of mostly classical music and three or four good stereo systems in our home (our Rowland system is currently not set up). I think I understand what ripping a CD means - you "copy" it to the SSD or hard drive on your computer. Then what? I used to edit for people with doctorates ;-), and I too feel extremely foolish asking these questions. I'm trying to grasp the advantages of owning a music server. I already own four outboard DACs, so that won't be an issue unless I'm missing something. I assume streaming is something like Netflix for audio. Does a music server connect wirelessly to the internet via a home router? Does it require a monitor, mouse and keyboard like a regular computer? What type of software does it use? Is the sound at least equal to Redbook CDs? Please point me to further reading if you can. I don't expect any of my colleagues here to write me a book-length response. Our systems are currently Wadia > Audio Research tubed line stages > Levinson amps > various good speakers, subwoofers, etc. Would it make sense for us to add a music server? Thank you for your patience!