Hi to all, I am late into the open backed headphone game, but am gearing to make a big splash into it by purchasing either the T1 or the HD800. Unfortunately I can only demo the latter, the T1 not being distributed where I live. I am almost exclusively into classical music, with the workload divided fairly between symphonic and solo/chamber. My sources are the Fiio X5 lineout feeding an iBasso PB2. I demoed the whole Sennheiser HD line (800 to 600) using an O2 amp, and will soon do so with the PB2. I have to say that I didn't like the 700, it was very comfortable but the sound just didn't cut it for classical. The 600 is, as most say, a nicely balanced headphone with a pleasing sound, but not the last word in dynamics, air and detail, especially on larger symphonic music. Comfort was also a big issue, with the clamp on the ears. The 800, which I tested extensively, left me with mixed feelings. I concur with the general impression on the 800's detail, spaciousness, vibrancy, and intensity of the sound, but I listen to too many substandard recordings (technically, not artistically), and sometimes the deficiences would take over the enjoyment of the music, and I would be left listening to imperfections in the reproduction of strings, rather than violins. The hum and hiss of old analog recordings, such as some Glenn Gould recordings of Bach, would also take over (together with his own legendary humming!) the piano sound, and the soundstage at times would be simply too large, leaving me with the impression of being in the midst of a sea of sound, trying to identify the general themes. So while the technical competency of the HD800 is not questioned, its ability to provide an enjoyable listening experience is. To cut a long story short, I would be very grateful to receive comments on where the T1 fits in all of this. Would it be a good compromise, ie an HD800 with less "intruding" qualities, would it inch closer to the HD700/800 comfort with regards to the HD600 and would it mark a clear departure from the HD600 sound? Would the PB2 drive it properly, given the higher impendance? Apologies for the length, or if this has been already answered elsewhere, but a fresh perspective would be much welcome.