Even better than "hifi", there are professional portable players out there - Edirol, M-Audio, Sony, Zoom, Olympus, etc - however they're mainly recorders, but some of them have really good playback functionality as well (absolutely definitely better than the garbage firmwares of the Hifiman, HiSound, etc). Many of them cost less than so-called "hifi" players from shady outlets, and all of them have state-of-the-art technology inside, of course.
The Sony PCMD1
is a real looker as well, as far as steampunk/cyberpunk goes:
This one's $1999.95, though.