Better recordings/masterings have been more important to me than anything other than loudspeakers for about 15 years now.
The Steve Hoffman Music Forum was invaluable in this regard, even if the Beatles threads literally took weeks to read.
More recently superdeluxeedition.com has also been helpful.
https://superdeluxeedition.com/
Then there is also the dynamic range database of course. It’s still helpful as ever during this era of loud/compressed music.
Andrew from Parlogram on YouTube is also good.
There must plenty of other sites too.