How right you are about obsession with record cleaning.
I have had a Nitty Gritty Auto for more than 30 years. I have 4000+ albums but I now rarely have to clean one. When I buy an LP (used and new) I play it. If it is noisy I clean it. When I got the Nitty Gritty I bought three 50-packs of Nagaoka inner sleeves I use to identify cleaned records. I have been on the last pack for around 10 years now.
I think other posts are correct that the amount and perceived volume of surface noise can depend on the turntable, platter and mat materials particularly. If you feel you have too much noise, you can experiment with this.
I really don't hear surface noise on my records even listening between tracks with the volume up. Do other people eat dinner off their albums?
Don't buy Karajan's Ring. Buy Solti. It's a better performance and it's on vintage Decca so the recording and pressing quality is second to none. In the stupid early 90s era when new and used LPs were almost free, I bought a second copy just because it was it was nearly unused and priced at just £15 or less than £1 per disc.
When choosing albums from the golden era it is worth being picky about label. As just one example early Rolling Stones and Beatles were on Decca and EMI vinyl respectively. Both were top quality then, the vinyl I mean. But even on this material the SQ on Decca is easily recognisable as superior. Listen to Aftermath, UK pressing. With 53 minutes of music jammed on one disc the SQ on my 1966 first pressing is brilliantly clear and detailed. Better than on Revolver 1966, also my original pressing, which is itself pretty good. By the way, I've had these two 55 years and played them a fair bit and they aren't noisy. I've never cleaned either of them - no Nagaoka sleeves.
But I agree about Barenboim/Dupre.