What are your go to LP's for evaluating new gear or new tubes?

I don't stream anything..........yet. Never say never but I am very content listening to vinyl and cd's, mostly vinyl. For serious listening, it is vinyl 90% of the time. So...........I'm really looking for what pieces of vinyl stand out as stellar performers in your collection, such that you use them for reference. Jazz is something I never listen to so any jazz albums will mean nothing to me. No intent to offend, I just won't know it. Thanks for any input and to those who already replied.

Steely Dan's Aja and Pink Floyd's Dark Side of the Moon

The Reiner/CSO Scheherazade, Joni Mitchell's Court and Spark, Ry Cooder's Paris, Texas

This LA4 East Wind Direct to Disc!

For me it is usually Opus 3's Test Record 1. Especially the first track, Therese Juel's Tiden Bara Går. Then Barbirolli's Elgar Cello Concert and Sea Pictures. Both are very well recorded (goes without saying for any Opus 3 recordings) and I know them intimately, which means I quickly pick up on differences in the sound.