I listen to this stuff. Unfortunately the albums are so compressed, pro-tooled, bright, overblown, etc, that all you can do is minimize the damage the album producers and engineers did. I think my Yamaha pro 400 works pretty well for this kinda stuff. It is capable of taking all that bass energy and making the drums standout without muddying stuff up. Allows for subwoofer type bass when the song is recorded with it. Good soundstage for orchestras and does instrument separation well. Even with all the phones I've bought and tried, I can't think of one that makes modern metal sound good. I'd recommend you bring a portable player to stores or headphone meets and try some. If you don't own one, you could get a Sansa Clip pretty cheap. That's got verified measurements that show terrific performance.
looks like your soundcard has an output impedance just over 10
http://www.stereophile.com/content/asus-xonar-essence-ststx-soundcards-measurements
I recommend you read some of the links in this search
https://www.google.com/search?client=opera&q=headphone+output+impedance&sourceid=opera&ie=UTF-8&oe=UTF-8
I can tell you that for a lot of old metal, the Yamaha is outstanding. Original cd pressings(not remasters) of stuff like And Justice For All, Storm of the Light's Bane, The New Order, Burzum, Blessed are the Sick, Somewhere in Time, Killers, Keeper of the 7 Keys, Stormrider, Burnt Offerings, Cruelty and the beast, Seventh Son, Defenders of the Faith, Souls of Black, and even Emperor/Anthems sound good here. Stuff largely done before the pro tools era. The Yamaha makes the kick drums sound more like real kick drums, even on albums like Practice what you preach that has a clicky kick. It won't be too forgiving of harsh recordings though. It may be less revealing playing them off of a higher impedance source or amp. Sansa clip is 1 ohm so it's very transparent.
Van Halen 1984 is awesome on the Yamaha, just played it the other day. Jagged Little Pill worked pretty well too. I've written about a lot of my other phones in various threads too like K550, Amperior, Momentum, RS1, K701, UE6000, and SR60. I think metal needs a phone that is clear but also provides headbanging bass. Closed phones smooth out the sound too, so there is a lot less static and things like that. One day I need to hear an M-100 as I heard it has a lot of bass and soundstage.