IMO, the VSonic destroys Brainwavz on the low end and high end IEM models. I had the VSD1S, and they blew the S0 out of the water. I can't imagine the S1s being much better than the S0. I'm also contemplating opening my S5 box, or just flipping them, I already have VSonic VSD1S, GR07 Classics, and AN16. IMO, the AN16 are by far the best I've ever used. I also can't imagine the S5s being any better than the GR07 Classics or AN16.