I'd look at SINAR F-1's if you are considering carrying a monorail camera on your back. They will give you all the movement that your lenses can provide, they weigh about as much (if not a bit less than) a Technika, and they assemble and disassemble quickly and solidly; they pack up very nicely and neatly for monorail cameras. They are also cheap as dirt now, especially considering what they cost when new.
This being said, you could probably get most of the movement you need in "the field" from a $300 Super Graphic, and have a nice folding package to boot. They are basically the poor man's Technika. I'd highly recommend doing some research on them.