IMHO, measurements, specs are all well & good... but ultimately, this hobby is so subjective that no amount of charts will inform us of what we like to hear on the day. E.g. i do like the benchmark HD6xx especially on a tube amp (which will always measure worse than SS amps) but I love my Elex and LOVE the Utopia. Yet I also enjoy the Audioquest NightOwl Carbon, a super laidback warm headphone and my LCD2C. A modded Hifiman HE-560 (ZMF auteur suede non perforated pads) is heavenly, and my current muse is the Hifiman Arya. I also have a ZMF Verite Ltd on the way. My likes are super diverse, i might even be accused of being easy to please. Yet I am not impressed at all by the HD58x, K7xx (only good for gaming due to extra wide soundstage), which others will sing high praises for. My 1 cent - YMMV, just try if possible before u buy, and go with what u like to hear. Don't let anyone tell you otherwise.