Dude if it doesn't sound big you've already fooked up.
Choose good samples, choose good synths and layer layer layer.
Reverb goes along way, I suggest you invest in a good sample/vst pack like komplete 7 which has very good samples and very good vsts.
Also it has reflector which kicks ass.

I produce techno that sounds like dubstep is my answer.
its all about 2005-2006 "dubstep" before dubstep became that wobble nonsense.