I think the Medalist may be an excellent choice for you, given that you are OK with a fixed lens camera (I am assuming the Fuji you borrowed did not have interchangeable lenses either), and as you say you are not concerned about the 620 film issue or the weight of the camera. As far as I have been able to tell, film flatness is not any kind of issue at all with the Medalist. I find the viewfinder to be more than bright enough, and its automatic parallax correction is a nice feature too. The split-image rangefinder may seem relatively small, but it is a joy to use since it has a great deal of magnification and is therefore extremely precise. As for its lens, the Ektar on the Medalist is highly regarded, arguably offering better image quality than almost anything you will find on a folder.