I'm using portable player from year 1998. The best player i own is an iRiver H-140.
The most important things i need from my audiophile perspective:
1. Best Audio Quality with the best DAC's in the market.
2. DSD Native Playback. Not DoP (DSD over PCM).
3. High Store Capacity. Like 2 or 4 MicroSD Slots. And very important, USB OTG. This allows me to connect a 1 TB. Pen Drive and to have for example, 1 Pen Drive for one style music, and another Pen Drive for other style of music. Like CD's.
4. Replaceable battery. For example, if i need to go travel for very hours, i want the option to change the battery when the first discharged. I want the option to buy 1, 2, 3, 4 or more batteries.
5. More big screen. 4 o 5 inches is best. 3 inches is very little. And more big fonts. Fiio X3 is hard to read and more for people with visual deficiencies. Fiio X3 requieres glasses for people with some years old.
6. User Interface: In Fiio X3 is hard to read the title song, the specs and more if the text is over the cover image. The information of the file needs to go on a black band (for example) with the name of the song, the artist, the genre, the rating, the quality and format, etc.
7. Playback options:
a. Continuously: In folder mode, plays the song, then the next song in the folder order. When fnish the last song in the folder continues to the next song in the next folder or the next song in the previous folder. Always following the same folder and files order structure. In Library mode plays the song, then the next song in the library album, artist or any other selected order, and when finish the last song, continues with the next song in the library order selected. (Like the iRiver H-140).
b. Repeat All: In folder mode, plays the song in the folder order and when finish the last song, begins again with the first song in the same folder. In library mode, depending the order selected (artist, album, style, etc.), when finish the selected order (artist, album, style, etc.) the begins again with the first song on the selected order.
c. Repeat: Plays the song and when finish plays the same song again.
d. Random All: Plays random any song in all memories in the devices.
e. Random: In folder mode, plays random any song in the folder order and when finish the last song, begins again with other random song in the same folder. In library mode, depending the order selected (artist, album, style, etc.), select any random song on that order and when finish the selected order (artist, album, style, etc.) the begins again with anyrandom song on the selected order.
8. An option to select a song to be the next to play when finish the actual playing song.
9. In library mode option to select various criteria. For example i want to play Rap Songs, from year since 1984-1990 and with ratings more than 3.
10. Lyrics support and Sync Lyrics Support.
Thanks for reading.
Javier.
Madrid. Spain.