I need MUSIC for my new Ipod Touch?

I have 8 gigs of free space for music and I have no idea where to start lol. Any suggestions? I listen to anything... alternative, acoustic, rock, metal, hip hop, electronic, pop... pretty much anything but country (but I'm open minded). I like DMB, Kanye West, TI, Slipknot, Staind, OAR, Korn to name a few (yea I know very spread out) Thanks guys I hope to choose a best answer ASAP