Abbazz
6x9 and be there!
Regarding the lenses again, the Mamiya 7 lenses are not just 'yeah, well this is kinda sharp' bu more "wtf...er...I have never seen anything like this sharp".
You seem to have a good knowledge of the Mamiya 7 lenses for someone who doesn't even own one. Having compared many 13"x19" prints from the Fuji 6x9 cameras and the Mamiya 7, I can tell you that there is absolutely no visible difference in sharpness between both cameras.
I owned a used GSW690 3 for about a week until I found a long hairline crack in the plastic body and returned it. IMO the Mamiya is much less of a brick and better made.
That's your opinion. Having no electronic parts, the Fuji cameras are very robust and reliable. Only the body covers are made of polycarbonates (high quality plastics), the rest of the camera being made of heavy brass and steel. These are serviceable in almost every country in the world and they will remain for many many years, as parts can be made from scratch should the need arise. When I dropped one of my Fujis in a small town in central Vietnam, I was happy to have it fixed by a local watchmaker. And if you are concerned about the plastic covers, buy an old G690, which has solid brass covers. Of course, it weights a lot more than the more recent MKIII version, but it also sports an interchangeable lens, with 50mm, 65mm, 100mm, 150mm and 180mm lenses available.
The Mamiya 7, which is of course a very attractive camera, is somewhat delicate because of the amount of electronics it contains. Try to have a Mamiya 7 repaired on the spot in Cambodia or Mongolia... When Mamiya will stop supplying the parts for the electromagnetic shutter or its command circuits, this camera will become unrepairable. I know this is not going to happen tomorrow, but I don't like the idea.
Cheers!
Abbazz