Thank you for making the time to write such a thorough review. BTW, one slight disagreement with your statement on the use of mobiles. Try the new LG V30 if you have a chance. Drives my 300 Ohm HD600's with authority directly through the headphone jack and with plenty of reserves. The DAC chip is based on ESS ES9218P, which is very similar to those found in many high-end DAC's.