Thanks for your reply.
I used the iAudio J3, but because of a virus on a computer during my travels it's broken now. Reformatting solves it, but the second time i connect it's back and it's crashing.
I have an iPod Nano (V6), but the sound to me just sounded terrible. Maybe it would improve with an amp?
Also i'm looking at players with amp/dac included. Like HifiMan, HisoundAudio Rocoo and Colorfly C4. Which might be a good solution.
Another option with be another iAudio, which i really enjoyed, and add an amp.
Hard to just guess at it. Sure, i read reviews, but they are more or less all positive. There's no store around here where i'm able to test it.