Suggest music to me!

[Pandadude]

K this is my first forum post so if I'm doing something wrong please enlighten me

Anyways, I want to increase the size of my playlist, so i was hoping people could suggest some artists to me and help me discover some more good music. To give you an idea of what kind of music I'm into, heres a list of my current favorite artists.
Avenged Sevenfold
Nightwish
Queens of the Stone Age
Rob Zombie
Slipknot
System of a Down

thanks in advance, and if anybody has the same idea and is looking for music i don't mind you posting it here.

Hi ;p!