Floyd Wish You Were Here is pure class :)
Saw Metallica here in Christchurch NZ few years back, epic stuff :)
If you like heavy and want something that might be out your comfort zone try Death Grips Takyon Not sure what you would describe them and every track is totally different but they do get a lot of following from metalheads. They have a lot of the complexity of metal but in a different way. Insane stuff :)