I'm looking for a new phone that would, hopefully, pair well with my Shure SE535s. To me that means no audible hiss first, low distortion second, and detail, soundstage, etc. third. Needless to say, the one thing that gets most on my nerves is the hissing. I know the bar is high, because these IEMs hiss with almost anything. They even just barely hiss for a couple of seconds with two different Fiio X5 II units after they turn on, but after that it becomes inaudible. The phones I'm considering the most are any with LG's (technically ESS') quad DAC on board. The G6+ (H870DSU), G7, v30s are available in my country, but I can't demo them without purchasing (dumb, I know), so I must rely on recommendations here. I also hear the Galaxy S8 has a HiFi ESS DAC and that it shouldn't be that much different compared to LG's Quad DAC with low-impedance gear, since the rest of the DACs only fire up with high-impedance gear. The problem is, I think I listened to a friend of mine's S8 it and it hissed audibly. I also plan to switch to CIEMs at some point in the future and I'm currently interested in UE Reference Remastered, and some 6-8 driver models by 64 Audio and JH. I don't know how sensitive these are, but I'm betting they'll be very sensitive. So in the long run, I'm looking for a phone that's just a match for high-end IEMs. Finally, if I eventually don't find such a phone, would I be able to achieve a satisfactory audio experience with some 20-75 ohm resistance adapters and a phone with a 24/32-bit DAC?