High quality CDs

@rman9
What you are looking for is called XRCD (Extended Resolution Compact Disc). They are much more expensive than a regular CD ($30 or more). You can buy them anywhere online. Elusivedisc.com is a good place to start.

For what it’s worth, they sound better than SACD. 

@bdp24 thank you so much.. There is a huge selection of classical music at Harmonia Mundi.. Can't tell you enough how elated I am.. Thank you :)

@spenav will any CD player like the Luxman D03X be able to play an XRCD? I have an older Rotel CD player that plays HDCD.. Do I need a special decoding player?

Stereophile and The Absolute sound review recordings each issue. 
 

Of course a good streamer will allow you to find recommended ones from, for instance, Qobuz or Tidal… and look up recommended albums from magazines… never getting stuck with something you don’t like.

@rman9: And the HM albums are by-and-large very well recorded. Plus their artist roster if fantastic: lots of the best "historically informed/original instrument" musicians in the world. The repertoire includes lots of Early Music and Baroque, along with some Classical (Mozart, Beethoven, Haydn, Schubert) and Romantic.

In the 1990's Harmonia Mundi U.S.A. had parking lots sales on Sundays at their Westwood (or was it Santa Monica?) office/warehouse. They sold newly-discontinued CD's and LP's for five bucks each. I bought a lot!