To: I ponderous, I'm really thankful for the help. Everyone's been great. When I mention opening a floodgate, I meant my PM inbox not the thread. The offers keep coming--even after the post!
Please do not PM me with offers. Again, this is not a for sale thread.
I've logged about 35hrs are so on them.
To Midoo: I am comparing the JH13s to a Grado GS1000i (up for sale) and a Senn HD800 (demo). They are both full size circumaural dynamic phones. They push the air around your ear to a much greater extent than the armatures of an IEM (esp. the GS1000 and HD800). This effect is also aided by their open-backed design, which also gives you minute bits of crossfeed information. Also, unlike IEMs, they give you additional spatial cues by interacting with the outer ear (the "pina").
I don't pretend to understand all the physics, psychoacoustics, or audiology involved. I just know for myself this all translates into a feel of the music being located in my listening environment. This is a personal thing. I am listening to music, enjoying my house, reading, etc. IEMs, for me, close me off from my space. They are designed that way, to isolate acoustic interaction. This allows there to be a pure experience of the acoustic ambiance that was recorded in the studio or live venue. For me this translates into a transporting experience. They make me want to close my eyes and "go there." To my mind, the JH13s do this better than any IEM. It may just not be right for me as I intend it to replace my primary phones.
Given all of this, I am wondering now if it is a fitment issue. This is my first experience with custom molds. I didn't think placement could be adjusted like regular phones. However, I did give them a shot again and accidentally changed their location. They are still sealed but sit protruding more outward. Any IEM will never be full-size, and vice versa, but this does seem to move the sense more toward full-size.
I'll keep everyone posted. Thanks again for all the helpful options.