Well, as you must have already seen, I bought this DAC some weeks ago, straigth from the Fiio marketing, in Hong-Kong. Although the D3 carries an unbelievable value, US$28,00 (door to door), it brings also some shrill, and the consequent fatigue. As I´m always listening to Grooveshark, or any other radio, while surfing, I had to find a workaround, and to my relief, Fidelizer has donne it here: I can listen to music for hours, without getting tired. It sure deserves to be checked !
(Thanks anyway for your tip, I didn´t know MP4nation, still. And my congratulations to live in such a beautiful city, too...)