It's so strange. I don't like techno a single bit, electronica falls flat for me, but this dubstep stuff... I have to admit I am feeling it.
Emalkay - Mecha
wait for the 45 second mark, sounds like some kind of insane machine is activated.
If you have a subwoofer, check it on that stereo. When the "machine" is activated in the song, the bass goes lower than my system can handle. 20HZ or something. Phenomenal.
Diary of an Afro Warrior (another subwoofer destroyer)
Benga - 26 Basslines
Cookie Monsta - Deadbeat (very weird one, still cool)
I have about a zillion of these. But this is basically what the genre is. Super filthy, insane basslines, almost always instrumental only.