wilashort,
There's nothing weird about the JVC's midrange to me. No tunnel effect. I think you'd have to hear the DX1000 to see if you'd like it. I know that that's hard to stomach, since it's expensive and hard to find. I've been in that boat, and have spent a lot on cans and amps, only to find that the "big" differences that Head-Fiers claim to hear between specific pieces of equipment are generally not as startling or distinct as they make them out to be.
Hence, I've settled on the DT770Pro out of a Denon integrated's headphone jack. My wife and I - I always bring her in on these matters, in order to buttress my own shaky sense of what's what! - find the DT770/Denon combo as good as anything else I've heard in my sig below. Which either calls into question my own sanity, or else the sanity of many of the people on this forum!
As for the DT770 soundstage, that tends to be something that I find hard to describe in any headphone. Either that or else it's just not my top priority. If pressed, I'd say that the current DT770 and the 2003 version both soundstage "respectably." Maybe Skylab or others can talk about it better than I can. In any case, neither version seemed/seems deficient in that respect, but neither does it seem a particular weakness.
Again, I feel very awkward and defensive about how pleasant and musical the DT770/denon combo seems to me, because it isn't politically correct around Head-Fi.
Even though people give lip service to the idea that "whatever you like is good" there's a not-so-subtle and condescending attitude among the cognescenti that implies that such a modest and simple set-up is beneath them. Yet I hear it as warm and musical and fun, across the board.
I wonder if anyone else feels that way?!
And if so, is there a way to stay on the forum, read it and participate, without grinding your teeth all the time and feeling like a second-class citizen?!
After all, I'd like to enjoy the music, and many of the other systems that I've owned below were actually quite painful compared to the DT770Pro80.