I'm looking to pick up a new pair of IEMs and after some research, I've pretty much focused on the Periodic Audio Beryllium and the Oriveti New Primacy. If anyone has these pairs, could you comment on which is better? I normally listen to pop, classical and a bit of rap and will normally use IEMs when I commute, so there might be some abuse on the IEM when commuting, so build quality is also a thing. I also use an iPhone 7 for listening to music when commuting, so if there are any problems with impedance on it, please state it out. Thanks!