I need isolation. When not playing games, any 'phones I use will likely be worn while walking alongside a main road that is also a fire engine and ambulance route and a bus route. They need to be able to block out the sound of big diesel engines revving on an uphill stretch, with added sirens.

I should also add that my hearing isn't what it used to be twenty years ago (I wonder why?) and really high-end audiophile stuff is ... meh; I simply can't tell the difference between $500 speakers and $5000 speakers (although I certainly can tell $50 from $500).