I concur with the soundstage issue, but it's curious that you (dB) find the HP-50 uncomfortable. They fit kinda ok on my head - maybe a bit tight, but not too much. Though, I rarely do a listening session longer than 20-30 minutes.
I took the HP-50 to the girlfriend's place today to let her try them for the first time - she does some amount of choir singing, so I thought she might appreciate the sound. As she put the phones on her head, the first comment was that they seemed comfortable. Unfortunately, her onboard Realtek chip couldn't handle the HP-50 too well; there was practically no bass and only just enough volume for a normal listening level. What she found about the sound, regardless, compared to her KSC75, was that the singers' consonants (like 'k') sounded especially clear - to the point she could visualize them being physically produced. The KSC75, she said, kinda just blurted the consonants out. She seemed to really enjoy (approaching what looked like eargasm level) a particular singer with the HP-50, who she said sang more in the upper registers - where I guess the lack of bass wouldn't be such a problem.
All in all, the HP-50 got a better reception from her than the HOK 80, even though the HOK had the benefit of being run off a proper amp.
Edited by vid - 3/15/13 at 8:45pm