What's my ideal music server? Read and recommend please


Right now I use a MacBook Pro as my server, and it drives my DAC. My MacBook Pro is getting cranky, it's storage is so full I don't have space to do a current Mac update and I am beginning to think better sound quality can be achieved than a MacBook Pro via USB to a DAC. I use JRiver media center, v.27, and right now, my JRiver and MacBook Pro aren't working properly together as I keep loosing the proper MIDI setting and get no audio output.

I'm aware of the Aurender N100H. I know that uses a USB output and I'm starting to wonder if USB is my best bet. Then I see the Aurender N100C which has a digital coax out, but that output is derived from the USB, so what's the point?

My wish list- probably no less than 2 TB storage; got to be easy to use in terms of getting music into it and playing music (downloading music from say HDTracks to JRiver is the bleeding edge of my technical skills); sound quality has to be first rate. I would also be interested in a server that has a BNC output, as a regular coaxial output can never be a true 75 ohm connection but a BNC can be. 

So- what should I have on my short list? Recommend away please, and thanks-
128x128zavato
There are a good number of threads attempting to answer this question and you might find it beneficial to look through this forum toward that end.  

The Aurender N100H is a very good unit - in terms of quality, it’s the middle range of the three servers I have.  And, all are better than a MacBook both in sound quality and in utility. 

USB is a fine interface if your DAC has it implemented well.  If so, there’s no reason to shy away or look for an SPDIF output. My best server has both outputs and USB is the better of the two.  But, it’s really DAC dependent. 

There’s a used NAD M50.2 here on Audiogon.  The BluOS system is also quite good. Though many would argue that Aurender’s conductor is better, BluOS is very good if you use Ethernet instead of wireless.  The M50.2 has a disk drive so you can rip to the internal hard drive, or use it as a player. And used, it’s a quite a bit less than an N100H new.  If I were starting again, I look seriously at it.  

Of course there are others, again - worth browsing this forum. 
Thanks! I’ve looked at other threads- looking for the most current thoughts on this topic 

the Aurender has been recommended to me a number of times 
zavato 
... Aurender has been recommended to me a number of times
My Aurender N100H had a fit with even a momentary loss of AC power and software updates were rocky. Support was indifferent, and I'm being kind. I dumped mine after less than a year. Aurender has cultivated quite a mystique, most of which I find undeserved. YMMV.
@cleeds sorry to hear of your experience.  My own experience has been quite good. I found the system more stable than the other servers I own and updates effortless. I’m at a loss to explain the difference but it should be noted by the OP.