I know DX100(mine is Hibino R10) is not on the list, but I just received mines, and it's amazin. Curra, it could be great addition to your comparison as it seems to be a top contender. I prefer it over the DX90 and the X5. The stage is wide, and it pushes the dynamics more. It's not as tight sounding as the X5, but it sounds more natural as it's warmer. Vocals are amazing and it makes my NT6 vocals sound close to TG334 vocals, very euphoric and textures stand out, but not sharp. Even the TF10 sounds better than it does with other sources. I think it's a sonic upgrade for TF10 owners. Of course it scales up with higher end iems.
Edited by SilverEars - 6/12/14 at 5:43pm