I have been interested in the Simaudio 700i, a friend of mine has the 600i and it sounds very good with his set up. It seems the Sopra 2's respond very well to integrateds that are more high level. I have the Hegel H300 and the Sopra's really respond well. Best my Hegel has ever sounded. I also have the Hegel 160 for my smaller system, going to try that with Sopra's tonight, bet it kills!
I was concerned early on that there might be a systems match concern with the Sopra's (per some articles), the more I read, that doesn't seem to be the case.
Really feel fortunate to own the Sopra 2's.