Mamiya 7, a rangefinder camera that I find one of the best medium format for travelling. Its lightness is the strenght point, the body and the lenses waight less then a minumum DSRL sistem, but us also have a gorgeus finder and a so quiet shutter that you have to guess if it worked or not in a noisy street.
Being a rengefinder camera has its point on the image quality, the 6x7cm negative you get can be really full of details and with all the shades of gray you want.
The quality of the lenses is undubtly high. The 43mm is an hawsome glass for landscape and street photography, wihile the 80mm is a perfect lens for beautifull portrait. i don't find a lot of sense on the 150mm if not for some landscape, too hard to have a good framing and focusing, the same if not even worst for the 210mm.