I'm quoting you not because I disagree, I don't, but your post brings me to my point. I agree the 701's get hate because of their sound signature, and a lot of people say that they need to "fix the bass", they don't. No it's not accurate, and it doesn't sound like the real thing, but it has a sound signature that i'm addicted to, It's just what sounds good to my ears. It's what I like to call the "Yamaha sound" because every one of Yamaha's string instruments, and a lot of their other products all share some of the same ideals in sound that I prefer (The exhaust on the LFA even has the Yamaha sound). It is most evident in their pianos, you will find two groups, the ones that love them for there perfect clarity and well it's just an exactness about them, and those that just hate it because it's "sterile" and won't settle for less than Bosendorfer (holy **** best bass of any instrument ever, but yamaha owns them now), and that is the best descriptive word that I've heard it called, but around here analytical is more popular. You really have to play the crap out of them to sound good because the piano sure as hell isn't going to help you, but it will show your skill and emotion as pure as it is, and if it's crap then tough luck. It's the same thing with the 701/702's, they sure as heck aren't going to make your music sound better than it is, they are going to put every flaw up on the big screen with flashing lights, but when you've got something really good under the spot light they really let you enjoy it for all that it is, every stupid detail is there. my favorite thing is when you can hear the vocal chords slap as a singer bridges the gap between chest and head voice, it doesn't sound "live" but it sounds more human when you can pick out those details that make a song less perfect and more honest. I think that we would all be lucky to have a closed headphone with the tightness and detail of the 701's, no it's not perfect for everything, and it sure as heck isn't good for every music style, but the detail makes it valuable to have around. I think that people need to just better understand what that sound signature really is good for and what it isn't before they tear it apart.
That hinge looks crap though even if it's pretty, I think that is going to be a problem, just like I think the "elastics" on the 701 will give me a bad day sometime, but maybe i'm just nitpicky after my hdj1000's broke in half in less than a year of lite use.
experiment: go into guitar center and go in the acoustic room, strum any Taylor, which is a tight and very pleasing sounding guitar, then strum a yamaha (even a Chinese one), the taylor's are tight, the Yamaha's are laboratory equipment.
Yamaha:
http://www.youtube.com/watch?v=rR94NDIfGmA
Bosendorfer:
http://www.youtube.com/watch?v=PaNXdg0iFrU
(the sound quality on this one isn't as good, but it's my favorite performance, so deal with it.)
The LFA:
http://www.youtube.com/watch?v=dKzPD0AEB8I
(Just because)