Ok, in the money is no object, get the best image for the weight category
I would go with a Mamiya M7II 6x7 with 50mm lens. Set it to hyperfocal and everything is in focus from 10 feet to infiniy. Nice, wonderful images; Not all that heavy compared to some of the other SLR suggestions.
I hiked all over Israel, even in the southern mountains and I was impressed with the agility of the camera. The transparancies I got back were amazing.
Make sure you get the external battery so you can keep it warm against your body.
--Jeffrey, Scarsdale, NY