I haven't used the Fujitsu 5220 , but I have the 3093GX, 4097D, and the 5530C in various user departments. They are all excellent and long-lasting. One way of making life simpler - the newer models can work with USB 2.0, don't need the SCSI card and driver complications any more, and the performance seems to be just as good.
Another question to ask - are you going to retrieve the documents only as Images, but index fields, or are you going to store them as searchable PDF's, so you can search by words contained in the document. That makes a big difference in the storage and retreival product, and which scanner you choose (whether it will create searchable PDF's directly from the scanner, through the documnet capture program, of as part of a release process).
Other products in the Document Manasgement and Archiving space = Documentum, OpenText, and LaserFiche. You might want to check into all of them, as far as ease of entering documents, whether you can do full-text indexing, Web-based retrieval, ability to interface with other programs, and licensing (initial and ongoing) and support costs. You'll also want to get factory training on Administration and Support of whichever product you go with, even if they insist on having it installed by one of their certified partners.
Fred Wagner