Well the T70's landed today.
My first impressions upon opening them up are as follows.
Good heft, not heavy. They actually were slightly lighter than I expected them once I opened the carrying case.
They are smaller than they look online and are slightly smaller than my HD650's (maybe not THAT small.)
I really don't like Beyers cord management for packaging. The cord has dents in it from the twist wrap and kinks from the spring wrap.
I don't care much for the cord, maybe I was spoiled with the great cords on my HD650's and Westone UM2-RC.
They are comfortable, not as comfortable as the HD650's which caress my head, but they are pleasant and unobtrusive.
The velour is nice and supple, which was a big decider in this pair over Audio Technica or Denon.
Isolation is decent, it's somewhere directly between HD650's and UM2's.
For sound, comparing them to HD650's they are more harsh in the upper treble.
The sound is very crisp, like most reviewers state slightly recessed lows, but you have to give up something with closed cans.
There is a slight case of sibilance which can become annoying with certain singers (the s-sounds really pierce from some performers notable Queen).
Overall I'm finding myself very happy, we'll see if they "burn in" or if my ears get more used to them.