Hello, I've read a few threads that alluded to a comparison of these two products, but no post explicitly stated which of the two is a superior product. I previously owned a pair or s4's, and was satisfied with my purchase, no doubt, but the mids and lows of the s4 seem a bit synthetic, and fail to capture the true acoustic sound of many of my favorite recordings (I'm no audiophile). So I was wondering which buds you head fiers would recommend. My current collection: a pair of broken monster turbine pro coppers, and a pair of Denon AHD2000s. My preferred reference tracks include: Subterranean Homesick Alien (Radiohead), The W.A.N.D. (flaming lips), and Temporarily Like Achilles (Bob Dylan) for good measure. Any feedback is much appreciated.