Octopo:
I have now had the pleasure of listening to the DM and I still own my old Beresford MK 3. I couldn't test them together though from what I heard of the DM, it is not that far ahead of the Beresford - though I did feel it was more musical, whereas the Beresford is more scientific.
The great thing about the Beresford is it doubles as a headphone amp (if you aren't using Grados) - but that's about it.
The DM has XLR out, a digital pass through and a USB input (my DM knowledge isn't great but these seem like the standout features to me) which makes it more versatile as long as you aren't using headphones.
If I was to buy one of these DACs now I would go for the DM, happy in the knowledge the extra cash bought the better DAC.
I want to dislike the Cambridge on account that i feel the extra money is partly for extra connections, the name, those funny equalizer type buttons (???), and the name.
You're not helping.