It depends on how you plan to use the camera. If you want a quick setup and don't need a lot of movements, the Fotoman or maybe the other brands will work. I have a 617 roll film back for my Canham that I settled on, because most all my shots require a lot of rise to get over roadside clutter. I don't backpack and can't walk a long way.
That led me to settle on the Canham, and I am selling my Fotoman on this forum's website.
If you live in Hawaii, I am told a 90mm is the right lens, I could never use anything less than 180, thus my choice is for the big camera and all its associated problems.
One can actually hand hold the Fotoman.
, if that is your plan, It is a good choice.