I am planning to purchase a DAC/USB/headphone amp to upgrade my modest CD player (Sony NS999ES), improve the sound of hi-res music stored on my iMac and played through my stereo, and set up a nice headphone capability. I was set to purchase the Benchmark DAC1 HDR when I saw Sam's review of the Musical Fidelity M1 DAC and M1-HPA.
Can anyone enlighten me on the differences in sound quality between these two sets of products?