Suggestions?

I remember as a kid only listening to old country with my dad, at the heaviest he'd go motley crue. Used to think it was awesome. Then I moved in with my mom and she listened to rap and heavier stuff than my dad like Metallica. Well I became hooked needless to say and I need some new music. My music tastes continued to get heavier through high school and college. Most listened to bands are probably Lamb of God, Children of Bodom, and Megadeth. Maybe generic but if so please point me to some good bands like this. Thanks to everyone in advance.