I was looking into this at my last job. ELO is big (Electronic Leitz Office - Leitz are the people who invented the Lever Arch file and are moving into the electronic age). In Germany they work with Xerox for integrated solutions.
With a large Xeorx copier, you can scan directly into the ELO archive and it is read-only, so that they are legal documents (at least here in Germany).
d.Velop's d3 is excellent and integrates better into Windows Vista and Windows 7 search and start menu enhancements, but I don't know what the state of their English version is - it is a German company.
If you go to the big printer/copier manufacturers, they all have a print and scan solution, which can be integrated with a DMS system. Minolta Konica will do a full analysis and come up with a price per page printing solution, plus DMS system, Xerox, Triumph Adler (Kyocera) also offer the same service.
You pay for the DMS licences and they provide the printers/copiers on a cost per page basis for printing - Xerox provide only colour devices, but up to 5% colour on a page is counted as a black and white page, for example, and you can usually get it for a small monthly sum, plus 1c per page.
The solutions are very nice as well. You generally have a central printer driver, which works for all printers in the organisation, so no more driver problems. You can have security code printing - the job stays in the queue until the user turns up at a printer and either places a smart card on the device or enters a PIN code (the same in reverse for scanning, use the card/pin and the scanner offers the user's folders / department folders on the DMS system for auto scanning). You can also scan to e-mail or fax and print to fax from the desktop.
There are certainly lots of options out there.
The Xerox system is very smart, but I think the TA and Minolta systems are more popular, at least on the printing side, but that could be a cost thing. Unfortunately, my old boss looked at the several thousand square feet of cellar space and said we didn't need an electronic archiving system (even if it was more efficient and cost effective, in terms of employee time searching for documents), so I never got around to getting quotes...