A very very short while ago, I purchased the Sennheiser Amperior headphones which were my first headphones I ordered after checking out head fi. I've since tried 6 headphones, and I've only decided I wanted to keep 1, and the other ones I'm either unsure whether I want to keep or not, returned or selling, like the AKG K240, Grado sr80i, Sony V6, or Sennheiser Momentum. I did test out the Hifiman he-400 very briefly but decided I didn't want a headphone for stationary use. So I guess I could say that the Sennheiser hd 558 is my favorite headphone I've had so far (it's just hooked up to the headphone jack of my computer) because it's probably the most useful, even though I don't use it very much.