Rush. Because it's the only one I've ever seen. It was still awesome, though. I do want to see the Volbeat concert that's coming in November, but I don't know if I can make it in time with college and all.
Never seen them live(obviously), but there one of the best live. [yt:2znghdxl]ltRwmgYEUr8[/yt:2znghdxl]