DAC is not necessary. Difficult to answer on the sound quality question. It depends on many variables. If you are just streaming 128kbps mp3, then it matter little. If the wireless network is slow, it will sound bad irregardless.
Assume all the computer side business is well implemented, it sounds ok for a $200 device. Don't expect it to sound like a newest Wadia DAC or even a Benchmark DAC-1.
Assume all the computer side business is well implemented, it sounds ok for a $200 device. Don't expect it to sound like a newest Wadia DAC or even a Benchmark DAC-1.