Thanks everybody!

Yes I know that the upgrade v4 --> v8 means a new machine hence a significant cost. That is precisely why I would like to be sure that I would be investing on the long term with a new 861.

I have had a look to Steinway-Lyngdorf, but I have not listened to this system so far, and and not very fan of being stuck on the long term with one (small) company for my whole system.

But if I could be confident for the future with 861, I would definitely favour this option, and even possibly pairing it with a set of 7200SE.

Looked also to Trinnov, which seems interesting.

Thanks again.