The Essence with Naim gear IMO is too much, the Essence speaker isn't a good balance overall, they do have some outstanding traits with the Naim amps, but swapping to other manufacturers amps brings them to life.
The Druids are a fine match with the CDX2 and Naim amps as they calm their (what can be termed) as bright and glassines, with the further opened tweeter unit in the Soul Superfly I wonder if this will still be the case? In my experience the CDS3 that Mahughes moved upto when listening to the Essence at our dealers, is a better match with these speakers, but IMO not a very good match with the Druids (that I once had), with the slightly dark nature of the Druids presentation coupled with a similar darker sounded CDS3, culminated in a sound presentation which was not engaging or enjoyable overall.
I do believe that mine and Mahughes requirements regarding engaging music are one and the same, it is just that we have/are tackling in it in a different direction. But I could be wrong;)