I create .flac files from my CDs using EAC. I also created a few .wav files of the same tracks just to test if I could hear a difference. It turns out that flac files are good on the DX100 but I found the wav version to have a bit more dynamic range, which is very important to me. Most of the tracks on the CD I create as flac to save space. But the special tracks, the ones I listen to most, I create as wav. The DX100 handles this mix just fine.
So I always thought the one downside to .wav files, other than the large size, was the lack of tags. But I experimented by adding metadata to wav files via MediaMonkey, including artwork, and then copying those files to the DX100. And guess what? That metadata does display when playing the wav file in the DX100. Now I like my DX100 even more!
Wait so you are saying you were able to get Album art to show up on WAV as well as all tags? I agree on WAV sounding more dynamic and open. More effortless. I especially feel this way on the Studio V 3rd ANV. Never tried it on the DX100 though.