Hi Dhartwick
I think prior to tweaks, there was a fair bit of difference between the Nemos and the Bel Canto REF1000Ms in the showroom. In my case, the BC and Nemos were carried by the same dealer who also carried my speakers (Thiel CS3.7s) so it was very easy to make a direct comparison. In the showroom, the Bel Cantos sounded very lean vs the Nemos. The bass control was similar but just felt more weighted in the Nemos.
In the time I had the Bel Cantos, I made a couple of significant changes:
a. Sound Application RLS240 conditioner
b. ASI Liveline power cords
c. ARC Ref 5SE
With these in place, I felt there was a significant improvement in the overall performance of the system.
When I swapped the Bel Cantos out for the Nemos, the major change I felt was in the bass. It was still as tight as with the Bel Cantos but there was more authority and more presence to it which I liked, similar to what I heard in the showroom. But the leanness I heard in the showroom was alleviated by the ARC tubes.
As for the Plinius SA-Reference, my friend feels it edged out the Nemos. It's rated lower in terms of power output (that's what I meant earlier) but in terms of performance, my friend preferred it a lot more than the Bel Cantos and based on the experience of the same dealer showroom, he thought it sounded just a bit better than the Nemos.