I am pondering getting new headphones but there is ONE thing that kills listening for me hard: sibilance. I belong to those people where, listening to a sibilant device, my ears are sensitive for hours to an end. So it's a no go.
But man, do many headphones have this characteristic in various degrees. DT880, M50, Ultrasones... actually, only my Senn MX-880 buds and AKG-K319 buds are really good for me. Actually, they are a touch soft since they make even the output of my Galaxy S-II acceptable, which will saw my ears off with sharpness on my M50.
The DT-880 were even worse then the M50, I traded them for the M50. But they are still sibilant, if only to the point where after 20 minutes I have to stop or it will really get to me.
My current reference setup for that is the headphone out of a Matrix Mini-I hooked up to a Marantz PM-8003. Not the most detailed combo (mini-i) but smooth. With my ribbon tweeter speakers the sound is simply clean and detailed. I'd like to get headphones which manage the same simple cleanness. If I have to choose, I'd rather have the treble resolution if my earbuds than have the full-on sibilance of the cans I have tested so far. Oh yeah, I have one can that doesn't bother me: old AKG K-240 sextett. But they lack so much compared to what I'm used to that they are not really an option.
So dear headfiers, if you are also sibilant treble sensitive and have good reports about a headphone to share, please do. I'm looking for something in the low-to-high midrange, so no 1k headphone suggestions please