The XM5 spec sheet is unusually complete: 250 g, 30 / 40 hour music figures, 3.5 hour charge. Sony also publishes a quick-charge note (minutes of charge for hours of playback) on marketing pages — treat that as “up to,” which Sony already does.
We do not invent an isolation decibel score. If you need a lab plot, read a lab.
Shortlist reason: published endurance and weight, still a current Sony flagship as of this research date. Price honesty: official shops discount it; the MSRP remains $399.99 on Sony’s U.S. pages.