This is going to be very subjective... Though I would recommend K712 Pro for low to normal listening levels. They have really significant amount of bass for neutrality seakers but they offer enough treble and soundstaging to be still balanced enough and not overly veiled/muffled.
Btw, I like k712 Pro the most with metal... These are definitely very good for metalheads. Not perfect but I would go as far to recommend them over LCD-2 due to their better soundstaging and a bit better FR balance. They are forgiving enough as well, surprisingly.