Re: A good Jazz CD?
Dmacc's PDF is very good. It does miss out some of the 'European' - style Jazz (e.g. ECM) that came a little later. I'm a big fan of Jan Garbarek's early 70s albums as well as Keith Jarrett's European and American ensembles - both of which have something different to offer.
The more you get into Jazz the more you realise that there are some big historical changes that all come together fairly closely chronologically. Big Band from the 30s and 40s differs hugely from the Bop played in the the 50s, which sounds very different to Post-Bop, which also sounds very different from later albums released in the 70s.
Steep yourself in it!