This weekend I've enjoyed HE150 earbuds paired with 780 a lot. Even though they have pretty high 150ohm impedance, 780 doesn't fail to drive them well. Sound has great punch and soundstage is spacious and deep. Mids and vocals are especially really delicious on 780 as @jdog said. I by the way do use 780 as my primary dap, and I find it really nice to use. But as mentioned, always when changed between sd card and internal memory, database has to scanned again, which does take some time especially with my 64gb card. Today I by the way removed all album cover art tagging from my music files aswell all unnecessary files from my sd card since it's not really use to have them with player like 780. Sd card scanning time reduced from 4m10s to 3m37s, not huge difference but it's something. I have used to use artist playlist navigation as it's really fast compared to folder navigating ie there's no playback starting lag like on folder navigation.