I can confidently recommend the D-zero SE version. The SE version has a 24bit sabre dac, and sounds pretty freaking awesome playing high-rez out of my HTC Butterfly, either with its amp or through my ALO Continental. From my search it seems it is not on iBasso`s English page, but there are a ton of Japanese sites showing/rating it. Here`s the amp`s FB page:
https://www.facebook.com/media/set/?set=a.383702481730653.1073741826.153876568046580&type=3
Spec page:
http://www.hibino-intersound.co.jp/information/3462.html
how much is it and how does one get it?