I have used high end portable players for decades, always staying on the cutting edge. You want a high-end DAP. Out of the gate I would recommend an Astell&Kern SP2000 DAP Music Player. I have the SP1000. I got there in increments. It streams, plays from internal memory, and has SD card. It is the size of a thick cell phone. They are built like tanks, and really beautiful.
If you want high end sound… this is the way to go. There are others that are good as well. This is arguably the best. You can drop down in quality and cost down the product line… then there are other competitors.
If you want high end sound… this is the way to go. There are others that are good as well. This is arguably the best. You can drop down in quality and cost down the product line… then there are other competitors.