Got my pair in today. I like the new box style alot. These headphones are maybe the lightest pair of full size cans i owned. The comfort is very good, pads are pleather but very comfortable, headphone "dissappears" very quickly when worn.
In the beginning the fit did bother as it seemed to suffer from the same problem as the W5000 did, but to a lesser extent. After wearing them for half an hour these problems were gone. The headphone will be a little loose but the pads are completely sealed around my ear. Initially you might feel the need to push the cups closer to your ears, don't! This will result in a boost around 100-300hz which might appeal at first, but overall the soundstage will suffer and the sound looses a good bit of transparency. The fit was tuned the way it is.
Technically this is an excellent headphone, it's smooth, has an extremly tight and well controlled bass, a very good holographic soundstage (w5000 like), has no obvious tonal flaws, is very detailed and has a fantastic transparency for a closed headphone. Also it is ALOT less troublesome with bad recordings as the W5000 was, i can basically listen to everything without fatigue, even treble boosted pop albums.
The tonality is "better" as it was on the W5000, i'd say it's pretty neutral with being a little bit on the warm side of things. The mids might have a small dip somewhere but atleast the lower and upper mids sound fine to me, not too thin and not too thick. Treble is no issue as i wrote earlier, but it also doesn't seem to be rolled off (hello dx1000), the a2000x sounds very airy, maybe a bit less than the W5000.
Also it's very easy to drive and sounds great out of portable devices. For maximum fidelity a powerful headphone amp is recommended. Through the benchmark DAC 1 headphone outs ,which are not that bad, it sounds a bit thin and lacks "weight" behind everything. Through the phonitor it sounds fuller and warmer besides some other improvements.
These are just my initial impressions. I'll post some ESW10 comparisons next year