Yeah, heard them, they're quite nice, but I guess I'm after even more exorbitant, let's see what the Aeon brings to the table, and still need to hear Atticus&Eikon. Not in a hurry! Yup, and the 400i seems to measure the same volume with inside the driver and behind the grill, not many headphones do that. The speed/attack of 400i is stupendous. I love it.