I think the M6 is much more cheaper On the same price level, Meizu is better

sounds really nice, I am dreaming to have one

C&C XO is my first headphone amp, since I have not compared it with another amps, I do not know which level it is in. But it is really full of fun for me, it makes my music listening more enjoyable, and I tried to change different OP to get different sound experience.