Re: Is this the best phone for sound quality?
There are some asian market phones that might compete from companies like Meizu, Letv, Vivo and Lenovo that have similarly high quality audio hardware and good reviews on Head-Fi, but in terms of widely available phones the V10 is currently in a class by itself.
I've owned a number of HTC phones, which have a reputation for good smartphone audio quality, and while they're a cut above your average smartphones, the V10 trounces them. The V10's biggest advantage is that it produce such a clean, flat signal with good power from the amp, so it's very resolving with a great soundstage and good separation and clarity.
There are rumors that the S7 might have a good DAC/Amp combo too (Samsung has used some decent Wolfson hardware in the past), and I'd imagine the G5 might continue what LG started with the V10.