Read his second post, he wants something that doesn't attenuate any of the frequency ranges. Essentially, he wants flat. I also call this balanced and analytic (analytic is a form of balance with one small change). Some may also call this signature neutral. Skullcandy are anything but this. Dunu trident have great quality, but it isn't a flat frequency, which is what the OP wants. The Tridents have a slight V to them. A flat frequency will actually sound mid-heavy due to the fact that your ears are more sensitive to this range. I own the EX300s, I'm sure there are some small changes from here to there, however, like with the Tridents, the 300s weren't flat for me. Based on that, I'm not certain that the 310s will change to a flatter sound. The most neutral headphones I've ever used are the HiFiMan RE0s, however, they break quite quickly unfortunately. So I can't recommend them to the OP. I still stand by the word of Etymotic HF-series or Etymotic EtyKids. The OP should note that Etymotic does add a small bump in the 2kHz region of these to adapt to the loss of the 2kHz region due to the way songs are mastered.