@dlowan,
With me being a dinosaur regarding such things, my lad scratched his head when I wanted the exact same thing recently, and asked me to give a simple sound dock a go, whilst joining something like spotify.
I haven't touched a CD since, and have spent many a happy hour searching spotify for rare and obscure tracks from my past, and sticking them on my now extensive playlist.
No need to download and store, just find, add to playlist and play them whenever you want. As long as you are online, you can literally find and play millions of tracks over hundreds of genre.
This sound dock sounds amazing, and cost me about £80.
Spotify costs me just under a tenner a month. (But is free if you are prepared to listen to their adverts now and then.)
Good luck.
From Amazon.......Pure Contour i1 Air Airplay Streaming System Docking Speaker Station for All Apple Items