I have trialed the Benchmark DAC2, it's... OK. You should try audition Metrum DACs, the difference is huge.
Also, for cheaper options, PCM1794A based DAC should sound better than the Benchmark DAC2, the 6 bit R2R in that DAC is good stuff.
Also, for cheaper options, PCM1794A based DAC should sound better than the Benchmark DAC2, the 6 bit R2R in that DAC is good stuff.