We are actively working on RoonSpeakers for Raspberry Pi now. This configuration will be possible within a few months. If that’s an acceptable solution to you, I would not waste your money on MS200. Use AirPlay for now, and switch to RoonSpeakers once it’s available.
Built mine, 8 GB ram, SSD. Fan doesn’t run at all. Feeding the optical in to a NAD DAC. They sound great and are not that expensive, certainly more than a Pi but waay less than a Meridian. Plus if you decide to go another way later, you have a viable 4k HTPC for use.
Ahh. Did not realize you had a nuc. If you get another try the Brix by Gigabyte, much better. Have you thought about a USB to SPDIF converter? That could work as a fix.
Peachtree X1 USB TO SPDIF CONVERTER. Even seems to be onsale.
I also have a pair of Phantoms, a Dialog and a RPI2 with a HifiBerry Digi+ board. While I wait for the imminent release of RoonSpeakers, I’m using Volumio (www.volumio.org). The UI is not great, but it can feed 192/24 to the Phantoms. I’ve also had it feeding DSD64 to my Devialet Expert.
I setup Volumio to pull files stored on my Time Capsule. Nice not to need a server powered on all day.
You should be fine with a wired network connection. I’m using an Edimax AC600 wifi adapter that connects at 433mbps over 802.11a/n/ac . It’s fast enough to play DSD64 and 176/24 FLACs flawlessly. I can playback 192/24 mostly ok, but I get the odd dropout if there is any network load (guess it could also be file access speed coming off the Time Capsule).