I would actually describe the HD 600 as having snappy dynamics (certainly not boring), but it also has upper frequency peaks and bass roll-off. I owned five electrostatic systems and would agree with your general description of an even tonal balance and rapid transient speed. But those two things have nothing to do with each other; it's just that they happen to exist together in some headphones. I'm not sure what you mean by artificial shimmering effect. You'll have to be more specific. I also agree that planar magnetics tend to have a smoother presentation. (Some refer to it as lush.) But they can be very dynamic on the right system, and some planar magnetic headphones like the AB-1266 and HE6 are famous for being among the most dynamic, impactful headphones in existence. Anyway, the most accurate headphones do not sound boring to me. The most boring headphones I've heard simply had mediocre performance in various areas.