Simaudio Moon 600i v2 VS Naim Supernait 3 for Dyanudio C20s


Hello Everyone,
I have narrowed it down to two int amps for my contour 20 speakers. My current room is 15 x 20ish and I am trying to decide between simaudio moon 600i v2 or the supernait 3. I have listened to them at different times in different stores but with the same speakers so I cant directly compare. I am looking for blacker backgrounds, better separation good bass control and of course good vocals etc.. I have bluesound node 2i connected to an external dac. I am strictly intersted in these 2 int amps. I know Simaudio is almost twice as expensive (if both units are bought brand new) but either could be had as used for a lot cheaper than their MSRP.
Any recommendations and experiences would be highly recommended. Again I am only intersted in simaudio 600i v2 or the supernait 3.

Thank you thank you!!!
Danny
danimaz
the simaudio moon 600i v2. Wasn't a fair comparison as the 600i is twice as expensive!
Thanks for following up.  I have the Simaudio 600i (V1) and am thrilled with it.
Hi danimaz. If I'm reading this and some past posts correctly,  you've moved from an Octave v70se to a Simaudio 600i v2 on your Dynaudio Contour 20 speakers. I'm looking at a new integrated for some recently acquired Contour 30s, and I happen to be looking at exactly those amps as good candidates. Would you be willing to share your experience with the Octave and then Simaudio? How was the Octave pairing and what made you look for something new? What does the Simaudio bring to the table that you prefer to, or maybe don't like as much as, the Octave.

Any info appreciated! 
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Did you tip the salespeople who demo'd amps for you so you could buy online or used?