Cambridge 840C DACs vs. Wyred vs. Eastern Electric

I have not heard them but I think the bigger question is which one has the best output stage?

No, I think the question is which sounds better to you. I've been burned before by assumptions based only on the technology used.

I'm also curious how the WfS DAC compares to the 840C. Not sure I want to pay the 15% restocking fee in case a trial doesn't work out.

I'm currently comparing a Neko D100 against my 840C (Neko has a 30-day trial with no restocking fees). Initial impressions are of slightly more high-end extension (but the 840C has sweeter highs, I think), slightly more midrange presence, and cleaner bass.

My vote is for the Eastern Electric Minimax Tube DAC that I recently purchased. It replaced a Bel Canto DAC3. The sound is excellent on the EE! For $770 delivered, it is a steal.