i'm gonna try to refrain from repeating what everyone said already, but IMO, Ety's are the only phones that
I have used that I feel are honestly worth their cost. [of course i wish they cost far less, but hey, they've got to make money too]
The products themselves are amazing, the customer service backing those products is equally stellar (they have repaired damaged phones for no cost! - maybe not in all cases, but at least for one headfier i know...), and they have an especially tiny niche in the audio market (hifi headphones is small enough a market, but isolating canal phones...come on now!!!).
R&D, little demand (relative to the entire audio market), and the fact that consumers
will pay $270 for Ety 4s's justify the price, to me.
Now, I probably sound like a sheer fanatic or Ety employee, but despite things like microphonic cords, their products never cease to give me joy.