My Hasselblad is easiest to focus camera I've ever seen or had. Get an Acu-Matte screen of any vintage (I have the split rangefinder spot which can be helpful) and a prism. The NC2 is a fine very low cost option. I think it is fair to say that none of the cameras listed above will be better than that combination except maybe the Mamiya 6....but that is a rangefinder and a completely different beast.