I have my DT880 Pro's 250Ohm and my BM that only took 4 days to get halfway around the world. I am still waiting on a decent (hopefully) TOSlink cable that's floating somewhere in my domestic postal system so all I have now is a total POS cable from MonoP.com. My motherboard doesn't have coax out only optical S/Pdif, sigh. Even still on that horrible cable where the ends were polished with a chainsaw this DAC/AMP has really put a smile on my face along with my Beyerdynamics. This is the first attempt I've ever made at buying nice audio equipment that would be above the norm. For me, spending $500 is a lot on anything, but I was so determined to at least taste what higher end stuff could offer. I am burning in both on music in a loop and it's easy to say headphones and the BM DAC sound better after even a few hours fresh out of the box. I know it will only improve over a few weeks of use. Music has always been a joy for me and now I can hear songs all over again. Thanks guys for the Bushmaster reviews and opinions, and thanks Stanley for making it so good.