The NuPrime IDA-16 is an excellent "one box" solution; 200 watts, great DAC. I've had mine about four months and really enjoy it.
Cheers,
Scott
http://http//nuprimeaudio.com/index.php/products/amplifiers-and-preamps/integrated-amps/ida-16.html
Cheers,
Scott
http://http//nuprimeaudio.com/index.php/products/amplifiers-and-preamps/integrated-amps/ida-16.html