been using fiios for about a decade. my earliest two, a x1 and and x1ii are still in rotation and each have well over 100 ski days of use (I use a range of wired helmet "speakers" though recently I just put koss headphones without the clips into the earpads.
Also had an m7 that made it about 2 years before giving up the ghost (battery I suspect), didn't bother with a repair, probably should have, it was a nice device when it worked.
AP80 Pro-X is tiny, that's a turn off for a lot of folks, but it's perfect for skiing, my wife and kid have one too. It also was my relatively recent introduction to iems (I thought I couldn't stand having anything in my ears as opposed to on them until a few years go). The AP80 ProX has 3.5 and 2.2 MM jacks (supports balanced headphones/iems). At $180 I still think this is a steal.
I bought two Japanese digital walkmans recently, the A306 and the NW-ZX707. Not sure I needed the japanese versions (higher power output), I don't tend to drive anything all that hard, or maybe I just don't have headphones that are that power hungry
The A306 is nice, but lacks a balanced output (though you can run usb-c headphones off that jack). Love the size of this thing. Using the A306 with the Truth Ear Nova and Linsoul Simgot IEMS. Love the way the A306 and Nova combo sounds.
The 707 was an impulse buy based on my love of the 306. It's amazing, but expensive and heavy. It doesn't leave the house. I use this as a DAC on my work computer along with a Sony MDR-Z7M2. That's really a joy to use.