I went thru the same thing, finally tried SACD, including new SACD versions of some I already owned, i.e. Oscar Peterson,
https://www.amazon.com/Exclusively-My-Friends-Vol-Really/dp/B0000C435I already owned this non sacd version
https://www.amazon.com/Exclusively-My-Friends-Box-Set/dp/B0000046LU/ref=sr_1_2?crid=3MDOO08LDQYWI&dchild=1&keywords=oscar+peterson+exclusively+for+my+friends&qid=1588343393&sprefix=oscar+peterson+for+my%2Caps%2C153&sr=8-2 some (all?) are hybrid, (standard and sacd versions same disc), like this Billy Joel, but you need to have control of your player to keep it from automatically playing the SACD version, or, use your old player to hear the standard version, new player for SACD version.
https://www.amazon.com/Piano-Man-BILLY-JOEL/dp/B004OKFIYU/ref=sr_1_3?dchild=1&keywords=billy+joel+sacd&qid=1588343252&sr=8-3 Eventually, concentrated comparisons, I decided the difference was lowering the noise beyond dark dark dark dark gray to black if that makes any sense. Music from nothingness. When not concentrating, not listening for that, there is no readily apparent difference, I stopped buying them.
So, don’t leap in, you might find the difference so slight, and taking too much concentration to hear the difference that is actually detrimental. buy a few, of discs you already own, or two layer ones that can play either CD or SACD quality.
you may hear differences that escape me.
.........................................
after all is said and done, I stopped buying CD’s, I buy LP’s! A good clean used LP sounds better than CD or SACD, and I properly clean my many old ones now.