These days I read in the forum hundreds of pages related to the X3, the X5, the DX50 and DX90.
Based on my needs, I realized that I should probably buy the DX90, but at present, buying in Europe, this DAP is out of budget for my pocket.
I have rejected X3 (perhaps wrongly) as from your feedback, it seems to be the less neutral.
Remain available options X5 and DX50.
I listen to pretty much everything, from medieval music to electronic music, jazz and symphonic.
I am looking for an audiophile neutral sound, a good headstage, and with an extended, accurate but sweet top end.
Normally listening with Grado SR60i with a flat pads.
I avoided opening the thread, but I have not found in the forum a comparison between these devices.
Please, let me know!