If that is more expensive than an external balanced amp module...then I don't know what to say
im not sure if you understand the modules of this player: you can take the AM1 off, and plug the AM2/3/? in its place.
if you are going to do balanced on something that can be exchanged, when the minority will be using this functionality, you dont release this as the default one.
You discover something new every day:
Wanna play your m3u or m3u8 playlists? It IS possible!
1: prepare your playlist, make sure all files have /mnt/EXTERNAL_sd/ in front of them if they're on your micro sd card.
2: open the FiiO player and go to "local music" (folder icon)
3: you should now see icons: songs - artists - albums - genres - FOLDERS
4: tap folder icon, and select SD card (if your m3u playlist is there)
5: find your playlist, tap it.
6: the popup Should list your tracks. If you followed step 1 you should be able to tap a track and it should start playing.
7: use the back button.
8: tap the mini player. You're now on the "main screen"
From here swipe from left edge of the screen to have the list of tracks slide out. This you can use to go to the track you want.