Best selection of Rock/Techno(Dubstep)/Rap

[Helios]

I was wondering because ill use them for my next videos.

[Kit Fisto]

I think this song would be cool! But you would have to really make it work well. 

[Anyder]

Dead by April - Dreaming
Coldrain - We're not alone
Bring Me The Horizon - Diamonds aren't forever

LONG LIFE SCREAMO/NIGHTCORE

[Dbiz]

[Unit 33]

Just three quick groups with that sort of stuff maybe:
Crystal Castles
Caravan Palace
RJD2

[Anyder]

:O Omg I forgot Asking Alexandria (All songs would be awesome for a video (A Cadlelit Dinner With Inamorta)

[Roxas]

CROW'SCLAW for Rock
inza for electronic/dubstep/etc.
Foreground Eclipse for pure awesome and epicness (metal, screamo)
Undead Corporation for the best MeloDeath ever.
Utsu-P for godly composition and oh god dem growls....
Alstroemeria Records (Oriental Dark Flight and Strawberry Crisis!! are very good songs) as are the albums Haunted Dancehall and Killed Dancehall.