How about testing one of the few lightning headphones that are on the market, like the Philips M2L, or the JBL Reflect Aware for instance? There should be a gain in quality, without going into the obscene prices requested by Audeze for HI-FI
However, i would really like the 4"7 to get Full HD, that is 1920 X 1080, and the 5"5 can get 2K . Basically that's what it would take for me to upgrade from my 6S