FWITW I would go with the Pentax 67 or 6x7.... the bodies are bricks and the lenses are relatively inexpensive and very, very good.If flash is consideration, the shutters is focal plane so synch is very slow only, but for landscape and general work, they just can't be beat. Good luck. You will love your 6x7 work. Old age and arthritis hae pushed me that way and 6x6.....
Logan