I've attended quite a few concerts during the last couple years (Roger Waters, Paul McCartney, Tool and too many more to mention). The greatest show I've ever seen has to be Rush on their "Vapor Trails" tour. It's right up there with McCartney and Waters, but there was something really special about that show. It was even better than seeing them in 1997 on their "Test for Echo" tour when they played 2112 in it's entirety. I'm planning on seeing Radiohead this summer, I think it will easily make my top five concerts (fingers crossed). What's the greatest concert you've ever attended?