I had two more thoughts if I may be so bold. I was recently at Glazers camera here in Seattle, one of the sales people had a gw690II. We talked a bit, and both think the Fuji rangefinder is the lightest, easiest handling camera* for getting a 6x9 negative. *(an Anba Ikeda with a 6x9 back, or that funny little Hansa 6x9 field camera may be lighter)
My other thought is if one is used to and at ease photographing with a Hasselblad, Bronica, Mamiya, Kiev, etc (cube body camera), The bigger rangefinders likely will not do it for you. I love my Mamiya 6, and the Hasselblad I ended up with just lurks on a shelf.
having said all of that if my Mamiya becomes irreparable, I may seek out one of the Fujis.
Funny. Since I bought a Blad, my Mamiya 7 sits in the cabinet. Each to his own...