Audeze LCD-X and LCD-2 Classic (both owned by a buddy of mine)
Hifiman Arya (I owned one until last month)
Focal Clear (still own it)
Sennheiser HD6XX (still own it)
If you ask me, all of them are amazing headphones, each with its own pros and cons. If you like warm, lush sound, with an emphasis on lower frequencies, then Audeze is your ticket. Personally, I preferred the LCD-2 Classic over the LCD-X. I don’t know how to explain it, but it just comes across as more honest and less pretentious.
Hifiman Arya is the one that won me over at first. The soundstage, resolution and speed were just amazing. However, in the long run the lack of dynamics, especially punchy and hefty bass, made me sell it, albeit very reluctantly. But to be honest, I could have happily lived with it forever.
Focal Clear was an odd one. At first, it didn’t impress because nothing stood out. But it’s one of those things that grows on you gradually. After I applied some EQ and paired it with a tube headphone amp, the Clear won me over. It is very balanced with just the right proportions when it comes to the lower frequency profile. In this regard, it sits squarely between the Arya (not enough bass) and Audeze (more emphasis on bass).
And finally, my all time favorite - Sennheiser HD6XX. I paid $200 for it, and this is one headphone that I will never sell. It is the perfect companion when you want to kick back and relax, or when you are trying to get some work done.