The "best" is all a matter of budget!
I would think a NAS over ethernet (like a Vortexbox) into an appliance (like the Touch) would be easiest and good, although Logitech has EOL'd the Touch, grrr.
Stepping up in quality and expense, you could build a dedicated USB-based CAPS server, or a commercial one box device like from Bryston, NAD, Meridian, Linn or Naim. I think Cambridge and NAD have some more budget oriented devices, too.
You can then optimize the USB transport side of things with maybe the new dual-headed Gemini cable from iFi audio, which isolates the data line from the USB power line.
I'd go for a Touch based system or a CAPS, myself.