I have two of Cash's American Recordings recordings on vinyl and they sound great. I haven't tried the CD versions, but maybe I will based on Hooper's recommendation.
One CD I keep going back to over and over again is Branford Marsalis Trio Jeepy (Columbia CK 44199). The three piece jazz band is extremely well captured on this recording... The dynamics (of the bass sax, especially) are amazing and it's very clean and natural. The double bass and the drum kit are extremely palpable too. To me, Trio Jeepy, although an older recording, was simply done right. It is a standout among my many recordings on just the standard Columbia pressing.
For a more recent release, try Ray Charles' Genius Loves Company. That's a fairly outstanding recording as well.
And if you like pop, you can try Jack Johnson's On and On, or In Between Dreams CDs, which are clean, have nice vocals and acoustic guitar, and excellent dynamics.