Many moons ago whilst browsing through boxes and chatting to others someone said he never went to concerts as the live sound is never as good as the record. Whilst in many cases I think this is true the experience when it isn't blows the argument out of the water. Do you have examples of where a tune at a concert made you reassess it, can be positive or negative. One positive for me was Strangers In The Dark Corner by Johnny Bristol.

seeing Hawkwind on acid sounds good .