No, it's NU-metal is #$%#$^, not what the #$%#$@ is NU-metal.
As far as tuning goes, I think it's only useful if you are going to be playing more than one note at a time quite often. Guitars have many tunings (Open D, open G, open Em, etc) mainly because of the new chords that those tunings offer.
If you want more range then tuning in fifths might be interesting.