The description by James on the first page seems to be nearly perfect for $699, I just have some minor observations
a) Android is the new craze in daps but sounds as '' Deja vu '' : ZX1,DX100,HDP-R10,AK100 II, AK120 II, AK240, PLENUE 1 etc , the competition will be tough at $699, that's just $50 less than ZX1 and about $100 cheaper than DX100
b) Sabre ES9018 DAC = HDP-R10 , challenging this dap is quite risky
c) Big touch screen : not everybody like that, some may have the needs to change the track without looking at the screen, at least an hybrid should please everyone '' small touch screen + physical buttons''
I think that Fiio should focus on max $500 to release the future best seller, rising up to 700 bucks is risky , people buy Fiio products instead of others mainly because of the low price tag, as long as it's affordable for everyone.
I personnally tried the X5 , the sound quality is very good but build quality is quite weak on the scrolling wheel and flaps covering microsd cards, poor UI lacking precision, this dap is perfect for $350 and can go up to $400 but at the risk of challenging DX90, which means that the actual price position of the X5 and even the X3 are perfect.