High quality CDs

Harmonia Mundi, both France and U.S.A.

@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.