I wasn't referring to the w1000x when I said boomy, just in general I was saying that the the MS-Pro has very tight and impactful bass compared to a lot of phones. I'm sure the w1000x has tight bass, but there is no way in the world it will have more impactful bass than the MS-Pro using flat pads. I have heard a range of Audio Technica models, and they all share similar balance in sound. Bass is always controlled and quite the opposite of boomy, but I'd hardly call AT bass impactful. And your generalising saying that grado's have rolled off bass, that may very well apply to the lower models, but the MS-Pro goes deep, as deep as the DT990, but is just far more controlled and textured. As for Open vs closed, the preference should always be open unless you need closed for isolation or leakage. The MS-Pro is so fast and dynamic its unbelievable. Contrary to many peoples thoughts, it suits any music genre perfectly, I have never enjoyed my rock, trance, rap, hip hop or classical music so much before using the mspro.