In my fan fic "The Hansen Diaries", I have the USS Raven's motto as "Doubting, dreaming dreams no mortal ever dared to dream before."
That is fantastic! As a fan of Poe here, I think that a good portion of his writing is very thought provoking and imaginative, despite some people thinking of him as only a writer of disturbing and dark stories.
Thanks! I also thought it was very apt regarding their mission to seek out and learn about the Borg.
(BTW, even though we see the dedication plaque in Voyager, we never get a good enough look to see what the motto actually is. We just see a line of text that is illegible. It's probably just, "Quoth the raven, "Nevermore.")