I'm a happy DevonThink user (but not a super fanboy, so I won't lose sleep if you don't like it as much as I do). What did you think was archaic about its UI? It has several different layouts to choose from. Do you think they're all bad? I won't disagree, but maybe because I've been using it for so long I don't really notice it. Also, what does it do to the Evernote imports? I've never used that so I haven't seen that before.

That said, it's really good at filing and searching. I'd highly recommend trying it long enough to look past the UI to its capabilities. I'd hate to be without it now.