I don’t listen that much to classical on lp because the wide dynamic range of the music is poorly served in this medium—average recording levels have to be set quite low which makes noise, like ticks and pops quite intrusive. Still, there are many very good sounding recordings on vinyl. Every record I have heard on the British label Lyrita was terrific sounding. Among my favorites for sound and content iis Elizabeth Machonchy’s Symphony for Double String Orchestra. I have the EMI recordings mentioned above and they too are good.
Jazz is particularly well served on vinyl, with many of the great recordings sounding better than digital reissues, and many originals sound better than vinyl reissues. If you want to show people how spectacular mono records sound, get a vinyl copy of Sonny Rollins “Saxophone Colossus.” Many original issues are very expensive, but, big labels like Columbia pressed a lot of copies so otiginal issues are not super rare and they are very well recorded. I like, for example, Brubeck’s “Take Five” and Ellington’s “Blues in Orbit” as examples of spectacular stereo recordings from the late 1950’s (it is sad to see how little recordings have improved since then).
For audiophile recordings of every genre, get almost every direct-to-disc recording for vivid and ‘alive” sound. M&K records (e.g. “For Duke” (Ellington numbers), “Fatha” (Earl Hines)), Sheffield Records (e.g. Wagner Ring excerpts, Amanda McBroom “Growing Up in Hollywood Town”) and East Wind (Japanese jazz label, e.g., Great American Jazz Trio “Direct From L.A. “) have amazing sound. Another great Japanese label is Three Blind Mice (e.g., Yamamoto Trio “Midnight Sugar”). The Swedish label Proprius does very good sounding records, although I did not like their famous “Jazz at the Pawnshop” for the performance (not the sound) and played it only once.