jw12Sorry to disagree, but X7 1st gen is a mess of a DAP and does sound awfully cold. FiiO has to hire better software engineer, their UI is just unable to manage large libraries...
X7 second gen is certainly better (but more expensive).
FiiO X5iii adds WiFi and Bluetooth over Opus#1, but at the expense of battery life (6 hours max), and with a laggy and buggy user interface. Soundwise it is fairly good but Opus #1 has punchier bass and brighter treble, so it depends on your needs and taste.
DX80 is even messier than X7 1st gen, and it's out of commission, since DX200 came out (but at double the price).
TienbasseAnd this is why he is stuck. I was in the same situation until I tried them all. After trying, the X7 was the obvious choice for me. My experience does not match yours at all. I guess preference matters a lot, and so they must try them out and decide for themselves.