I have always bought CD's (since invented; before that vinyl) and:
Converted to MP3 ( for use on iTouch) for on the go (camping)
Copied MP3's to an SD card for use on the road. and
Copied to CDRHDD player (full, not MP3) for home entertainment system with full dynamic range. Played through a stand alone high end DAC.
Some say I'm OCD
Works for me.