this is how I would do it: connect a NAS to a wireless router via Cat6. All PCs should be able to see the NAS if they are on your network. set up a laptop that can see the NAS wirelessly, and use Jriver with Jplay plug-in installed to send music from the wirelessly connected NAS through a decent USB cable into a USB/SPDIF converter. Go from the converter to the DAC of your choice, then into the system. You can control the music selection on Jriver from an iPad using the Jremote app. Yes the laptop is tethered to the system, but you are mobile with the iPad.
Yes you can buy a DAC that has an integrated USB converter, but most of the affordable solutions for this IMHO are not as good as using a decent external converter. My converter/DAC combo cost me $600, not including the USB/SPDIF cable.
Yes you can buy a DAC that has an integrated USB converter, but most of the affordable solutions for this IMHO are not as good as using a decent external converter. My converter/DAC combo cost me $600, not including the USB/SPDIF cable.