I tried the HD600s, HD800s, Arya stealth and LCD X on a chord Hugo TT2. I really think they are not worth the money. You get something more open but not by much and it's not better just different. They were all very similar but the clarity and timbre on the HD600 were better than the LCD X for example. However the LCD X had better bass extension but to me this is less important. You should try a Chord DAC !