Such a shame…They are all very beautiful! Especially the 'Fannie Moser'! Love that one! They look like they are sitting in a green house at the moment? I'm guessing though that your Winters are probably pretty brutal. It would break my heart to lose such beautiful plants…But I'd be more broken hearted to lose a member of the family.
I think I too, would err on the side of caution. Or maybe find a family friend or relative to 'adopt' the plants for the Winter.
Wishing you good luck, with whatever you choose. And hoping that your Winter isn't too awfully severe!