I have been looking at some IEM's from china lately. I have narrowed down my search to a couple of models and I would like some input on which IEM would be best for me. I use IEM's for mostly podcasts but when I listen to music it's a mix of Prog rock, Indie pop, Funk, Jazz, Rock, and maybe a little EDM, this is all being played from a Moto G 1st gen or a Sony Walkman MP3 player. My budget is around $25 USD the IEM's that have stood out to me are KZ ZS3, Tennmak Piano, Tennmak Pro, and Monoprice 8320. Is the price jump from ZS3's to Piano/Pro worth it? I'm also open to suggestions.