Lachlan has his unboxing and first impressions of Z7 up.
http://www.youtube.com/watch?v=0yW3n3_kerQ&feature=youtu.be
Sound quality aside, I am appalled that Sony is not learning from their past mistakes. Cable rattling issue from MDR 1R, hiss issue with Walkmans, for me I had a severe cable tangle issue in the Y splitter of XBA H1 and H3, and this time with their return Flagship Z7. Hope they go back to the basics before attempting anything fancy.
From my few weeks with the Z7 there is no cable noise/microphonics or tangling issue either at the splitter or in general.