I'm happy with my X5 2nd gen. I've had it for a year and only use it for a few hours per week.
No need to upgrade to a $600 FLAC player like the X7 for now.
How much better could the X7 be?
Please don't abandon the X5II X Relic X!!
Ohoho!
Demoed X7 on many occasions...
Amazing!
It's amazing in one word!
I still use X5ii for everyday usage, because the signature is better for me personally. I like the sparkly, lusty treble and the tight tight, fast, precise, pinpoint movement of bass using ie800.
X7 sounds more natural, fuller, mids are... idk... better? X5ii mids are amazing as they are! but X7 is even better! love both for mids! Amazing DAPs XD
But X7 has bass that has more natural decay, and treble is slightly more normal, where X5ii is slightly bright. I prefer my treble to be madly bright, if it were possible, I would take even more treble, but X7 has a treble that is smooth, has zero sibilance, and is still clear. Very very clear. That is a certain plus, it;s very well defined. Even a few ticks better than X5ii.
Overall impression is that I seriously love both players, would be happy with either. X5ii serves my tastes for now better, especially for the music I have, but X7 would be better for most people. Especially with AM2 or other modules, but these impressions are mostly for AM1, while AM2 is similar to E12A sound.