Oh! There are many of this "audiophile" players around. They all are bulky, low on battery life, typically not as good on UI, low on daily usability and some of them are very costly.
S:Flo2 is the only one of them which is affordable, powerful, flat. One can buy
Teclast T51, the original of this re-brand too!
ColorFly is retro looking, weighs heavy, costs an arm and a leg and not as popular even among head-fi.
Hifiman players would be
HM-801,
HM-602 and
HM-601. HM-601 are 'cheaper' around the price of iPods. Buggy UI, not a flat frequency response, powerful amp and generally finds greater acceptance among the audiophiles on head-fi.
Then there's
QLS QA-350, the no storage (SD card up-to 32GB supported), WAVE only player with 8 hour battery life. Slightly not as strong in bass, but otherwise flat. I read one remark in head-fi that someone rated Colorfly only next to QA350.
My "audiophile" player - the little Clip+. Cheap, flat frequency response, can be carried in earphone case, can survive a few drops, with Rockbox gets a working parametric EQ, expandable (though other players support this too, so that is nothing special), most of all it's
low output impedance. It is not the best player in the world as it lacks the power. With power comes better dynamics and sound stage, a bit better separation as well. Probably, that's what all these 'audiophile' players do. Will get one of them later and try to test this theory out. But, one should read the
scientific measurements based review by NwAvGuy to get why I like this rather cheap, mass consumer device over my other 5 players (Cowon S9, iPod Touch 3G, Nanite N2, Creative Zen V Plus, Fuze v1 - which uses a
slower Arm processor inside the SoC compared to Clip+, Fuze v2 and supposedly Fuze+ use the same Soc as Clip+ I think - not my words, read the link)
I may get one of those bricks, may be the QLS or get S:Flo2 much later. I too want to qualify myself with an entry ticket into the exclusive club of "audiophiles" than just an outside enthusiast