I've got a GS645 as well as a couple of M645 bodies--a Super and the original Mamiya 645. The Fuji is small and compact for the street (mine is not one of the auto everything models) whereas I use my Mamiya's usually with the WL finder which is also good for unobtrusive street shooting. Which one I take usually depends on how light I want to travel. I generally use the Mamiya's for landscapes and my Fuji for quite street. It's great for shooting in museums and art galleries!