I do not understand your complaint against T1 v2. You wrote that these headphones sound "boxed in" and that there is "an overemphasis in the 250-500Hz band." But there is a general consensus that, TO THE CONTRARY, the middle frequencies sound recessed, and not over-emphasized, compared to the previous original version. As for the alleged treble problem of T1, there is a simple mod, for some people who find the treble 'hot', which tones down the treble peak and fixes this problem. Just google it on head-fi. I am sensitive to criminal treble, for instance I find Grado PS1000 to be an unbearable ear drill, but I hear nothing of the kind with my T1. These are fabulous headphones. But I did not start going into portable/transportable hi-fi by listening to bassy-boomy-murky sounding and treble deprived headphones [the great majority of headphones sold] and that's why the hearing section of my brain was not startled and assaulted by mildly emphasized treble of T1. Brain molding/plasticity plays role in how we hear headphones. Those whose brains are used to and conditioned to crappy sound will find normal sounding headphones as abnormal.