I'm probably going to get shot, but...
For metal, look into the Vsonic GR07 MKII. You can find them on the forums for under $150 at times, and they're fully comparable to phones that cost several times their price range.
I've actually
never heard a better phone for rock or metal, and you can look at my profile to see the list I've owned/auditioned.
It combines armature-like speed with fantastic timbre with drums, and has an uncanny ability to make distortion guitars sound lifelike.
I'd tell you that I'd personally buy your pair if you were dissatisfied, but I have to pay summer tuition
It's at least worth a look. Don't let the price fool you.