Using disc sleeves of any kind or CD/DVD wallets will scratch the discs over time from being pulled in/out.
The best way to archive the discs and artwork is to use an empty 50 count DVD/CD spindle and store the artwork in a file folder. The reason to use the spindles is the discs will rest evenly on top of one another on the slight raise in the center, so the optical area is never actually touching the disc below it preventing scratches. Not to mention a spindle can take up less space than a bulky wallet or pile of discs in sleeves.
http://www.cdrom2go.com/product/usdm...om_675_657.htm has them for a good price.