I just could not get on with my 43mm. Sharp, good contrast, but not for me. Much prefer the 50mm, this angle of view with the 6x7 suits me. The 43mm on 6x7, has been replaced with a Corfield camera with a 47mm, but with a (now) enlarged 6x8 back, so it is just about 6x9. With the wider angle of view I need to use shift for the photos I want to take for some reason. Nothing wrong quality wise with either lens, but vignetting is present with the 43mm.
'considering getting the panoramic adapter'. I have one and it is a bit of a faff to use. However, It works fine and gives you access to more types of film stock