Ah...! So you too were hoodwinked by the "perfect digital sound" marketing angle on CD....!
<quote>At the moment, you buy a CD to avoid DRM and to get it in the highest quality possible.</quote>
CD's are recorded at 16 bit, so they aren't the "best" quality...24 bit CD would be much better....but no one does this in a consumer friendly "package" that is marketed properly...
The highest quality is basically on a master tape somewhere, or on LP or on SACD......all of which are on their last legs...master tapes you can't get hold of (en masse), LPs are difficult to handle, inconvenient, last 25 minutes per side (and then need turning over) and need a "player" that isn't portable...SACD never really took off, despite backing from Sony and one or two others...
And, of course, the record companies would just love us all to go out and buy the same music again (eg did I hear Pink Floyd was mentioned), so they make more money from something that's already been available before on LP, quadraphonic (CD4, QS, SQ), eight track, music-cassette, CD, DAT, SACD, MiniDisc, DVD-A, MP3 downloads, iTunes and now flash-drives...hell some of the stuff was even probably on shellac and spun at 78 rev's.....and I can also remember the BT "Dial A Disc" service - put your money in the slot and hear your favourite tune down the phone line.....! (Given that you can now download music over the phone line...someone at BT was almost ahead of the game back then...!)
Roll on the next human upgrade - a Wi-Fi connection wired straight into your brain...and cut out the middle man....!