Amazon reviews can be like Yelp restaurant ratings -- all over the place.
What is "best" always has a subjective element. You’ll find plenty of disagreement among Classical music lovers.
I’m not a serious classical fan but for decades I undertook an exploration of Jazz.
I bought a guide to Jazz CDs then proceeded to use spotify to listen to what was recommended to see what I wanted to purchase.
With Classical, where you will encounter multiple recordings of single composer’s work, you’ll want to listen to several versions to discover what you like. I’ve done this with a handful of Classical solo piano recordings I own.
A quick Google search on "Classical CD buying guides" brought up numerous books.

