I really don't like wifi or Android 2.3 on my DAP as well as touchscreen control. That said, they found out the specs on the DX50 thread was just some Thai's dreams and expectations. However I am really not cool with iBasso and their lack of proper updates. FiiO is more trustful. I want physical buttons, easy to use, good SQ, as high as possible capacity and battery life.
Artwork and screen quality or things like that are really out of my interest. DAP should sound good, play hi-res files without a problem not sync with email account and do fancy things.
That's my humble opinion anyway. Pure DAP is the best DAP, I don't like useless features and buggy controls.
Edit: As a simple example, the reason I stay away from Tera Player is lack of Graphical UI and wav stricted playback. These decision comes from Charles and they bring their own advantages as well as disadvantages. So, one should know his priorities and decide what to buy. I would love to see Tera Player with a minimal screen and more file options to play but Charles already knew these things and he decided what these features take away from the DAP is not worth it.