I think it's important not to go too big so as people can take in the image in one 'hit' without having to scroll around the image, a picture's impact is lost in this way, to a certain extent.
As for the image my eye is left to wander around the scene without it having a focal point...It's good to see an old russian lens still in use like this. Is it the 1B? If so, that is a very good lens...