+1 for Sonos. Easy to use and excellent interface with tablet or phone. As for sound quality, I would say just okay as an analog source and much better with a good quality Dac.
I initially used the Sonos Connect with a Rega Dac and was pleased with the results. A later upgrade to a W4S modified Connect was a big improvement, particularly with imaging. The last step for even better sound was to switch to the TeddyDac, which is well suited to my Naim based system. The sound quality is amazing, even with higher quality internet music from MOG (320K).
BTW, donÂt overlook the ability to access internet music when shopping for a server. Owning a large library of 2,000 CD is nice but having access to 16 million tracks for $10 per month is even better! Good luck.