Well I just made a Hard Electro comp and, well, as you can probably tell by the name it's
hard so it should give your speakers a pretty good workout.
Download
And there's always Hardstyle
and Hard Tech Trance (I think the bassdrum at 0:55 was created by Jesus.. or Satan. Perhaps a collaborative effort)
I'll let someone else handle the Dubstep and Drum & Bass. I'm not very familiar with those genres so I wouldn't be too helpful