I´m a longtime user of DEVONthink, and I do like it. But it would be lovely if Omni group created and app for storing referencematerial with the possibility to archive, that could link documents and files to other omni-products like Omnifocus and Omniplan. I mean it would be lovely if referencefiles where deferred if the linked task in Omnifocus was. Also imagine if it had a someday/maybe option that actually is clean and not cluttered.
I have tried quite a few different apps for filing and yes they may work, but none of them is so well designed and great as the other omni products.