Ciao Nardo, benvenuto! Ti rispondo in english.
I don't remember D6 which USB transcoder chip uses, be careful even if some chips works with iPad/CCK it's still possible some frequencies are not supported, usually 88.2Khz.
If you have an Xmos chip like the iBasso D7 all freq up to 24/192.
I've not considered DX100 for a number of reasons:
1) I want a big display to surf the net or watch movies
2) with SGFS 500GB I don't need a pack of memories to swap or search where is that files...
3) I can use any or upgrade the portable amp or use high-end desktop compatible USB DACs (Xmos chip is very common) with this high end battery powered transport (iPad/CCK).
Hope this help, alla prossima!
Edited by Thraex - 10/14/12 at 1:27pm