Haha... all this metal is shit...
If you are trying to make a DH movie, metal is the biggest killer of a video you can find.
There is way better stuff out there, that you can get way more creative with.
True, And I am a metal head, and have to agree.
Ever thought of using some instrumental stuff?
Instrumental music is good for certain passages of video for the same reason that supermarket music has no lyrics.
A vocal creates a focal point and distracts you from the visuals.
You may not actually notice this happening, but your visuals will have more impact with instrumental music. Espescially slow motion scenes or unusual angles because your eye is experiencing something it dosn't normally encounter so you want to let the visuals have the biggest impact possible.
Also, if you are going to use songs with vocals, keep them broken up with instrumental sections or narration. Multiple songs with vocals played consecutively tires your aural sunconscious quickly and the watcher will begin to lose interest or get restless.
I know it all sounds like a bunch of hoo harr, but just thought I'd give my 2 cents.
BTW - If you want any hard hitting, mellow/chill, or synth rock instrumental music let me know.
I have tonnes of reference material I can send you as I have a studio and have recorded music for soundtracks and sports DVD's before, so let me know if you need a hand with some tunes. You can use any material royalty free if it would help.