Slipknot is really good just because of the level that have taken metal. To have 11 guys all in sync and have the best live presence than anyone is such an awesome thing... I mean honestly who can top them? plus even the clown percussionist that just hits the keg could prolly kick your ass at drums!
I used to think Slipknot was badass. They were even my favorite band for awhile until I discovered death metal and black metal. Now I think they kinda suck. Iowa was alright though.