Thank you very much for your response. I will try to answer your questions and ask more of mine.
Budget around 20-25K --> you mean $ right?
That's correct. Then I think you will have to work with used products, or you start with new body+ 1or2 lenses + used digital back
What digital back then you recommend on the budget?
I cant also figure out how much difference I would notice in the type of work I do between hy6 and hy6 mod2. I heard that I would be able to upgrade the camera if I want later on. I saw you have hy6 on special at the moment.
I also cant quite understand the difference between AF and AFD lenses. I would ideally get 3 lenses: 80mm, 50mm, 180mm.
I shoot in temperatures ranging from +50 to -50. --> have you worked under these conditions already? Which camera did you use? Film or digital? because as far as I now working with a digital camera below -40°C is kind of heavy. Do you have special housing or "warming therapy" for your camera?
I used video camera in those conditions and I had a lot of problems, so I solved the problem with housing like that: http://www.pronto1.ru/components/com_virtuemart/shop_image/product/185c648d31365a5bcc264cdfff5c41f7.jpg
I would have to look for a solution in photo camera. Not even sure as of yet if it exists. You plan to come europe? I suggest you visit our factory and do some testings if you have the time to do so.
I do have a limited time as I have to start the shoot on Mach 25 and I would be flying directly to Europe to pick up the camera and straight for the shoot. Which in my situations it makes it quite difficult because I cant find a lot of cameras in Australia to test drive them. In my opinion, the combination of your requests (shooting outdoor, film&digital, 6x6 & 6x4,5) fits very well to our camera. But as this is a huge investment and a longterm decision you shouldn't take the final advice for your decision from a (biased) manufacturer. Of course I will try to help you and provide you all information needed.
That;s pretty much what I loved about the specs of this camera and wanted to know more about it.
I also have couple of more questions:
1) How sturdy is the camera?
2) Is there a rain jacket for it?
3) How easy is it to handle?
I am planning on investing into more lenses throughout the year and better digital back as the time goes on, its just the initial choice I am struggling with.
Thank you so much.