I have plenty of cards, but I also have a bunch of memorabilia. Recently I've been looking at modular bookcases, which I feel would give a uniqueness to my future display. My brother does wood work, so if I can't find anything I like, I may pay him to build something. Something I saw that has given me inspiration for what I'd like to have is this...
http://www.instructables.com/id/Modular-bookshelf-1/