i've long been impressed by the 1980 LP pressing of The Korgis "Dumbwaiters" which had less than average surface noise, much less distortion esp. on inner grooves than typical vinyl product of the time. the 1960 RCA red seal recording of the CSO/Reiner performing Rimski-Korsakov/Debussy [on CD] has digital-levels of low-level clarity, in terms of being able to hear all the little musical sounds such as musicians' breathing, mouth noises, chairs and music stands creaking, rustling sheet music etc. the FF and FFF parts are clean and golden, no distortion or treble compression which was more common with most recordings of the era. the Stereo Fidelity LP of Robert Hunter [under the pseudonym of "Georges Montalba"] "stereo fantasy in pipe organ and percussion" was also an exceptional sonic specimen for its day, commonly used as a hifi demo record in hifi salons back then.