what about a volumio 2 player for nearly nothing?
I stumbled over a 3-year old IGEL-H820C thin client for 0$ and succesfully put Volumio 2 on it and use an XMOS 32bit/384Khz USB-Audio DAC with it.
It is an Intel Celeron x86 device, very basic, CPU 1.1Ghz, 64bit, 1GB DDR3 memory, only 2Gb internal sata storage (industrial), but sufficient.
You can easily upgrade with mSata.
This is just an example, there a lots of those extremely cheap, low power thin clients on ebay and the like, running linux at a reasonable speed and they hardly cost anything. Most of them are small and often also fan-less, just pointing out for you, a real bargain (I saw a batch of 20 going for 5€ each).
OK, the Volumio 2 version for x86 is functional but not quite finished yet, Michelangelo and I are working on it.