I've been using some fairly thick jewel cases for a while, but seeing as how I live in a tiny apartment, space is actually becoming an issue. I've seen this over at blankmedia.ca, and am wondering what people think of this:
or alternatively this:
Anything that prevents the discs from becoming scratched will work fine. If you like jewel cases, you can switch over to the thin ones. Even the original spindles will work, but it's a pain in the a$$ to find what you want.