Dubstepforum.com

Try mixing the intro/build up at a slightly lower volume (a couple of db should do). Then when it drops you have some extra headroom to make your sound louder and add extra impact.

Also, I meant this: http://www.youtube.com/watch?v=eNOivzTSl4w with the bass out of nowhere thing.

Thanks for all this tips everyone, this thread alone should really help my production skills. And it almost sounds like the whole huge buildup vs. bass out of nowhere thing is a matter of opinion.