Youse guys have all missed the boat, in my opinion, and what happened to the option of adding our own choices to these polls? Get a refurbished LG V20 and don’t look back. Quad Sabre ESS DACS, headphone jack with a good power amp, Stereophile top rated, 400 GB SD card ready, 64 GB on board, will handle up to a two TB SD card when someone makes one, great camera, great screen, full Android OS, under $200 unlocked.
I think the Gen2 has more connection options (like Optical), and the balanced output on X5 Gen3 was widely considered worse sounding than the SE output (because it wasn’t engineered with a true balanced amp). It might just be nostalgia though, I’m not a FiiO expert.