One of the longest running, hardest touring bands in the hard rock or metal scenes is Sevendust from Atlanta, Georgia. They are considered by many to be one of the best live bands you could ever see. I have seen them somewhere in the neighborhood of 10 times and it is always amazing.
I am offering up here 2 songs. One called "Too Close To Hate" from their self titled 1997 debut CD and a song called "Forever" off of their 8th studio album released earlier this year. Enjoy.
OH and to ever so loosely tie this to MMA, The new #1 contender to be in the Middleweight division Yushin "Thunder" Okami used Sevendust's song "Driven" as his walk in music at UFC 69 when he defeated Mike Swick via *gasp* Unanimous Decision.