I’m far from being a metal head but found these “Vikings” to be pretty good.
Too bad I can’t use the SRH1540 with metal. Too much energy in the presence region (pinna gain) and I don’t like the idea of turning the volume down. 
On a separate note, adapting an IEM cable to this can had an undesired but predictable effect. Hope the image below is self explanatory:
Yes, my OCD-meter was skyrocketing every time I saw that. Luckily, I watched one of Super Review’s lives in the other day and he mentioned about the local warm-up trick. Picked my wife’s hair drier up, applied some heat to the the curvey area and let the gravity do the rest. 
Now we’re talking. 