Diamond and
Eomer: try pronouncing it as a single word, with the accent on the first syllable: SELL-ur-door. It's practically Elvish!
Lalaith: actually, the contemporary accent that is closest to that of Shakespeare's is not in England at all, but in America! The fishing outports of Cape Cod were settled by Elizabethans and the accents there changed little for centuries. In the last couple of decades, sadly, television and urbanisation have reduced the number of people who speak with a "genuine" Cape Cod accent, but there are a few left who can speak Hamlet's immortal phrase as it was once heard at the Globe Theatre:
"Tow bay, oor nout tow bay. Thaht ais th' quaystion!"
