Bruno,
I was really happy to experiment with your methods. Thanks for suggesting it!
When you first heard the SA-1's playing it was with a pair of Scott Nixon's 35 or 40 watt (can't remember) ampkit monoblocks. I had found this combo more pleasing to me than the AKSA on the SA-1's... So, that's just what I had them connected to when you arrived. However, the AKSA 100w is a stronger amp and provides more dynamics and soundstage than the SN's. Also, the SN's sound better after they've been on for 24 hours... and they had only been on an hour.
In any case, I found the SA-1's, Europa's, and Usher's to have strengths and refinement to justify their cost. I wish the Keelin's would have been working properly but I feel certain it would have added another good flavor to the mix of these speakers.
Thanks,
Carl