I love high energy live music. Nights spent dancing next to big bands full of horns and drums and stage energy are among my absolute all-time best experiences. However, I'm not sure if I can agree with you that live music, especially in the "rock" band genre (of guitars and drum kits and a singer) is always better live. In my experience almost every band I've seen live has suffered from poor mixing and the speakers turned up far too much. All the subtlety that made them my favourite bands is blasted away.