Earphones / Headphones: Where to try, what to buy?

A vinyl studio album is just a representation of the music.
Yes, quite correct.
I was pointing out the same kind of thing about live performances, I wasn't stating that representations are inferior. To suggest a live gigs with amps, mixers and speakers are somehow better than a studio mixed representation Is lauhgable.
Unless you are actually hearing unamplified music, you are hearing a representation. At a live gig the sound engineers have nowhere near the amount of time to get the sound perfect.