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:
how much is it and how does one get it?