I saw Trivium live when I was at an In Flames concert. Not a bad band.
I've finally figured out the Genre I've been looking for though, its called "Melodic Death Metal". In Flames is looked at as one of the originators of this style with Episode 666 and Jotun.
It includes such bands as Arch Enemy, Opeth, Trivium, Children of Bodom, and Soilwork.
Dean: Hairtossing is fun live. Though, I suspect you might like older In Flames better. Check this out:
Clayman (live)
Only for the Weak
Pinball Map