Elizabeth wrote: "Best tasting are 1950's Mono LP covers."
That may be true for you youngsters; however, I'd like to say the glue used on those beautiful seals used to identify the composer, orchestra and performers on the RCA Red Seal 12" 78s was beyond superb.
Further, those old Red Seal 68's were played on classic wind-up Victrolas (no electricity, so no power cable dissonances). In those days, the continuing discussions centered on the type of cactus needles used in the tonearm. Saguaro, Prickly Pear and Barrel Cactus needles all had their proponents.
Me? I preferred the Prickly Pear, as several microns of the juice might find way to the needle tip, adding favorable highlights to the violins.
George (The Old Fud)