If you want some great melodic metal, check out:
Arsis - A Celebration of Guilt
At the Gates - Slaughter of the Soul
Arch Enemy - Doomsday Machine
Kalmah - Swamplord
Gates of Ishtar - The Dawn of Flames
Amon Amarth - Vs. the World
Kataklysm - SERENITY IN FIRE! (That cd is amazing! Or their new one, Into the Arms of Devastaion)
If you want to take it a bit more extreme, check out:
Necrophagist - Epitaph (amazingly technical metal. if you like the melodic stuff, you'll probably like this one too)
Older Kataklysm - (Epic: The poetry of War)