Here are some killer heavy tracks to liven up your playlist. I have included an unreleased tune by Excision in this post, enjoy! and feel free to comment.
Excision - This Is Why Dubstep's Hot
Bassnectar - Boombox (Datsik Remix)
Tony Anthem and Axl Ender - Foxy Lady (original mix)
Taio Cruz - Dirty Picture (Cookie Monsta Remix)
Cragga - Please Mr Postman (Dubstep Refix)