I have a few thousand CDs myself, alphabetically arranged, separately for US, UK and Other. In recent years I have transferred most of them to my computer. I have an internal 2 terabyte hard drive and it's great to have instant access to everything my heart desires. My new music is practically all digital, I seldom buy CD anymore and when I do, I buy directly from the artist. When I'm away from my desktop, my music goes with me (iPhone & iPod). In the meantime, the CDs are collecting dust. What's their future? I don't know ...
pictured 6 of 18 separate shelving units for cds:
Organization is alphabetical by artist and chronological within artist. Classical sorted separately from all other genres, but otherwise no distinctions by type of music. Most is loaded on my computer for convenience.
I am violating the weight restrictions per cube section, but it seems to be handling it OK.
By cluster, where a cluster is defined as a grouping of CDs either by an artists group or a set of linked artists/groups. Then within that by artist chronologically. Grateful Dead and family has its own set up. And I have a shelf for new stuff and CDs by artists with upcoming gigs.
Downloads are either in the My Music folder or My emusic folder by artist by recording.