John, thank you very much for your detailed post!
In his book "Studio" Paolo Roversi is pointing out his 12 inch Dagor lens that seems to be somewhat special to him.
A photographer is offering me his Deardorff as he is moving away from 8x10, and i instantly fell in love with that camera.
I will probably try the 300mm and save a few bucks compared to the 360mm... Saving money for a longer lens might be a smart move.