I have around 600 CDs. I will keep them as backup in case I ever loose my encoded music or want to re-encode at a different quality.
One of my projects this year is to move my CD collection from the jewel cases to CD binders. In fact, I've already purchased the CD binders. Getting rid of the jewel cases will save a lot of space (which is very important here in Japan due to the small size of the apartments) and weight of my collection.
Trying to find the time to re-encode my music before reorganizing my CDs. I will be using iTunes to order the music and want my CDs in the same order in the CD binders to make it easy to find them.
Guess I have some work to do.