Just recently got my X3 through the Adorama sale...
A few questions/observations:
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3) Some screen protector questions...one was on the player out of the box, 2 new in the box. There were a few air bubbles under the screen protector...I attempted to peel off the sticker, which wouldn't come off cleanly and left a ton of adhesive. Now the screen protector is nothing but air bubble pockets and cosmetically looks pretty bad. Any tips on putting on one of the new ones? Can you even find extras to buy if you need to? I found this listing and was wondering if anyone's tried these yet:
http://xoskins.com/media-player-skin-protectors/fiio-screen-protectors/fiio-x3-screen-protector
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Other than those issues, have been enjoying the sound quality of all my 16/44, 24/96, and 24/192 FLAC files. Amplification is more than adequate for my Beyerdynamic DT1350s. I noticed a slight cyclic noise when I turned my amp all the way up when I tried it out as a DAC, but this didn't get in the way of the sound of files during playback at a lower volume.