Well I got a listen this evening and I have to say the Zsr is not a step up from the Zs6 for me. Big bass, with good extension but a pretty large mid-bass hump. Mids are recessed (probably partially due to the mid-bass bleed) and vocals sound distant and lack life. I hope they open up more as get a few hours on them and will certainly do more with them before I write them up. They are going to be a very V shaped signature regardless but maybe with more time they will grow on me a bit.