I think it will be useful topic for users with european volume limited players, such as Sony, Apple and others, or just quite players. No amping.
So let's start:)
I will start
Ultimate Ears Super 5vi (600)
Very easy to drive, good soundstage, good for club music and easy rock. Not very detailed, warm signature. Good build quality.
how about we just refuse to pay money for volume capped players instead