I have lots of classical recordings which sound great, both analog originals and DDD recordings. Polygram recordings are generally pretty good (like London, Decca, Philips, and DG). I have lots of good recordings by Telarc, Denon, Nimbus, Chandos, Chesky, Delos, Naxos, RCA, and others.
I don't find crystal clear in live performances, so I don't look for it in recordings, but often look for a nice ambience.
Electronic music is often crystal clear, such as a lot of Wendy Carlos's Switched-On Bach recordings.
You might find the London recordings by Charles Dutoit and the Montreal Symphony to be generally clear, notably their Debussy, Ravel, and Respighi recordings.
Some of the older Naxos recordings are not particularly good, but I think that from the early '90s they have generally been very good and they keep getting better. Smetana's Ma Vlast with Antoni Wit is excellent, for example, as are the Bruckner symphonies with Georg Tintner.
There are a number of ways of finding good recordings. Your local library may have some classical recordings which you can borrow.
Other than that, you can read the reviewers. I like the Penguin Guides as well as anything but there are a number of other guides which some like.