I have a Fiio x3 2nd gen. It's not perfect, but I like it. The menus are a little clunky, but it supports the formats I use (mostly ogg and flac), has replaygain support, works as a DAC on the PC, and sounds good. It also works with big memory cards (128GB, at least)
They were a bit slow to get some pretty essential features fixed/implemented, but they did eventually get there, and I'll definitely look at their current offerings next time I need a player.
MQA looks like a total gimmick to me. It looks mostly like not just a mediocre lossy format, but a THX-like certification program where they get to cash in on every step of the chain.
I say don't worry about it. It won't make your music sound any better, It just tells you that there was a pile of extra fees paid during the production of your music.