I know, for some reason the Empyrean thread is not the friendliest and most accepting one on Head-Fi, but I like to experiment.
I still love my Empyreans out of the TT2, this combo is the best I have ever tried and owned so far. But you know, as most of us I also can't stop thinking what could be improved.
I really loved my LCD2C for the bass. I also like the bass on the LCD4 a bit more than on the Empyrean. Mids and treble however are much more natural and airier on the Meze flagship, so trading in that last bits of bass impact and clarity is not really a question for me. I quite like the natural tone of the Verité (and Aeolus) but dynamic drivers just cant give me satisfying enough bass impact versus planar transducers when it comes to EDM. I like the clarity and detail of Focal headphones but to me they are a bit too upfront especially in the treble. I need something more relaxing than Focal but perhaps not quite as warmish and relaxing as the Empy? After a short audition I actually quite liked the HD800S, or at least some aspects of it (was a surprise to me). The spaciousness, separation refinement, definition was spot on. What I missed from the HD800S is a bit more bass impact (planar fan here) and just a little more soul/musicality.
Hifiman, before I forget it... And I won't mention build quality here. I owned and liked the HEXV2. Tonality is spot on for my taste, spaciousness is almost too much (I don't always want to listen to an open air concert), bass is there but not as focused as I like. The whole picture is a bit diffuse. I prefer the LCD line for focus and bass, although Hifiman is more spacious and more natural sounding. HEKV2 is better detailed and focused (short audition) but I have similar preference problems as I had with my HEXV2.
Up to this date the Empyrean is the best compromise I have ever tried for my taste and needs. What I would improve on the Empyrean is clarity, refinement, even more insight especially in the low frequencies. A flatter and a hint crisper, clearer bass impact (like LCD4). The natural and friendly tonality of the Empyrean is spot on and a unique selling point at this price range. (Not to mention comfort.)
To me the Empyrean is the best overall package I have tried so far, but that doesn't mean I couldn't or wouldn't want to tweak anything further.
Looking at my taste and history with headphones the only candidates that would worth for me to try are the Susvara and Abyss headphones. Both the Susvara and Abyss TC cost twice as much as the Empy. Technically they must be better, but technical performance is not everything when you are ready to drop 3-6K on a headphone. The new Diana V2 looks interesting, but I love my bass and from 3-4 sources I heard bass is not Diana V2's strength.
I guess my thoughts might contribute to further Meze developments instead. Remember, even just five years ago what headphones we had. Hardly anything from what I have just mentioned. Imagine, what headphones will come out in the next five years. This hobby is sky rocketing at the moment and it is still just the beginning.