Not too sure about where you could loan them..but definitely do not let the T70/ T90 put you off. To a certain extent (and to some, an unfair comparison), it would be like disqualifying an HD800 because of the way the HD700 sounded, or vice versa if you really dig the 700's.
The T70/ T90 are definitely acquired tastes. Coming from the T1 here.
I hear you on the 700's. There was something in the sound that was really off. I'm shocked Sennheiser had the audacity to charge $1000 for them.
I'm just looking for a headphone with ....
- A quality soundstage (Surround sound like with a bit of height and depth, if that makes sense, my 560s favored a more intimate soundstage and I'm looking for something else in that department),
- Precise imagining (may have given the T90s some flac earlier but the imagining on them was actually quite decent).
- Clean well extended bass that's quick and well controlled. (The 560s did all these pretty well, I did feel as though they could have had a bit more impact, Is even deeper bass possible?)
- Great detail retrieval (I favor treble over headphones that are deemed "too polite" so headphones with blanketed highs like Audeze's LCD line wouldn't really do it for me).
- Mids (I'm unsure here, mids that will allow vocals and the music to shine, loved the airy presentation of my 560s in this department but I'm open to other presentations)
I guess what I'm trying to say is something that's quite musical without losing the detail and quality of a high end. I want something that not only blows me away with its quality but has me feeling like I wasn't crazy spending what I did on them. I do know of the increase in diminishing returns the higher you go and certainly won't be expecting perfection.
I sincerely apologize if I'm sound too demanding here. The 560s are still my favorite pair so far but I still know I haven't reached my "ideal" headphone yet.