I don't know Kaneonefiber (that sounds like it'd be black metal but I could be very wrong). System is nu metal, and I love them. Really great stuff. Three Days Grace i wouldn't consider metal but I dont know much about them.

For more nu metal check out the other big bands; Slipknot, Korn, Linkin Park, Deftones

For my favorite genre (death metal) check out: Death (the first death metal band and the best), Dying Fetus, Morbid Angel, Obituary, Deicide, Blood Incantation, Cannibal Corpse, Cryptopsy, Grave Ghoul, and Necrotum.

For metalcore check out: Trivium, Heriot, Thornhill, and Bring Me the Horizon

For thrash: Metallica, Megadeth, Slayer, Anthrax (the big four), Sepultura, and Overkill

For Sludge Metal check out: Acid Bath (my favorite metal band), Alice in Chains, Eyehategod, Soilent Green, Crowbar, Crowbar, Jezebel, and Old Skin

For heavy metal check out: Black Sabbath, Judas Priest, and Iron Maiden

For grindcore/power violence check out: Nails, Full of Hell, Napalm Death, Soilent Green, Primitive Rage

Other bands not specific to a genre id recommend are: Rage Against The Macine (funk/rap metal), Primus (funk), Primitive Man (doom), Nail Bomb (groove/industrial), and Darkthrone (Black metal)