You might look into the iFi Zen Stream. It retails at US $399 and has a 30-day return period (in the US). I have not tried one, but I've built a couple of RaspberryPi-based streamers and though they were very good to excellent in a revealing system. Anyway IMO a lot of streamer performance depends on the quality of the downstream DAC; how good it is, and how well it rejects jitter, noise, etc.