[whpalmer4]

Note that as atreinke points out (and I've pointed out elsewhere) DT has the wonderful property that the links made on Mac A work on Mac B, iPad C, iPhone D so you can continue to access your reference materials wherever you go with only minimal hoop-jumping required. I haven't tried Yojimbo or Evernote to see if they have this same property, but given that Mail and Dropbox mostly do not, I don't take it as a given. Yes, one can keep many types of materials inside OmniFocus, but it doesn't handle large files or numbers of files as well as one might want.