Hi. Since I'm new in High-Res Audio headphones, I need good advice from you guys... Currently I'm using Sennheiser HD6XX + NuForce uDAC3 (USB DAC) and I was thinking about upgrading to Yulong Daart Canary DAC (used,mint condition 159$) because it has good reviews. My question/dilemma is, would I really notice the difference between two DAC devices and is it a good investment? I would like to say that I'm from Europe, not USA. Thank you.