Getting back to the original posters request, a Server which includes ripping, a possibility I haven't seen suggested is Innuos. This UK/Portuguese collaboration has had a very good review on HiFi Plus and comes in a variety of forms to suit most budgets. It is now available in the US I believe. Not sure what pricing is like over there, in the UK it is quite a bit cheaper than Aurender and Melco. It also includes SSD and HDD drive options, up to 4 TB's.
I use a traditional Mac Mini into a DAC, in my case, an Ayre QB9 and am wondering what a HiFi component has to offer, in terms of sound quality. I am going to a UK show soon, where Innuos promises to have the three parts of the upgrade path, Zen Mini, Zen and Zenith, available to compare. I will report back on the results.
There seems to be an unresolved dispute, shown in this thread. On the one side, all you need is a computer/NAS, on the other, a Server, streamer will always be better. What would be great, is blind comparison between say a Mac Mini and, Innuos, Melco or Aurender, Server. I can not remember seeing one. If there has been one, please direct me to it.