Not sure that you need us to introduce this one to you. The album that broke Aphex Twin to the masses (relatively speaking), Selected Ambient Works 85-92 starts with two genuinely sublime pieces of music, ‘Xtal’ and ‘Tha’, which your collection literally cannot be without. The whole thing is great though, whether for solo listening late at night or for esoteric dancefloors. An absolute classic.
Official 2018 repress 2LP on Apollo. Uses the 2013 re-masters made from original DAT tapes, cut by Matt Colton and presented in original artwork.