I have just bought a Beresford Caiman SEG and after helpful email comments from Stan at Beresford speced it with all possible upgrades (except the phono plugs) together with the Dorado 2.
After listening for 4 days I can say that the sound quality is very good, much better than the DAC in my CD player (MF A1 cd pro) and the DAC I used to use.
The soundstage is different from what I am used to, I think more natural, the instruments are more "together". Perhaps not impressive after a quick listen but definitely better in the long term.
Although there is considerably less digital harshness than before with the old DAC I still notice a little in the treble area, this has reduced with more "run-in" time. This could well be due to my 30 year old power amps that have not you been recapped.
All in all a worthwhile investment.
I shall be trying the Caiman out in 4 modes in the next week, with/without Dorado, with/without preamp and will post my impressions later.
Paul