I need music suggestions?

I'm adding to my music collection and I need some suggestions on artists/bands. I'm mostly looking for any kind of rock/metal and also dub step artists or DJ's. Please no boy bands or mainstream stuff I already know about from the radio. Examples of bands I already like range from soft rock to heavy metal such as foo fighters, metallica, styx, 3 doors down, a day to remember, august burns red, enter shikari, big chocolate etc. Please list as many as you can think of so i can start sampling there music