I remember going to Southend for a free concert once, in the 1990s. My sister and I saw Steps, I think Peter Andre too.
OP, do you want to go to a concert for the sound, or for the experience? I know an aspie bloke who works for a headphone company, and knows all about headphones. He let me try recently a £5,000 pair of headphones (along with a £3,000 pair) and the sounds on those were incredible.
George Michael's voice in "Don't Let The Sun Go Down On Me" is incredibly beautiful, far more beautiful than I ever knew before. He had the most beautiful singing voice in the world, it was such a tragedy that he died.
Maybe you could join the forums or Facebook groups of some of your favourite bands and see if you can make any friends from them?
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I've left WP.