I have one of the 6x12 multi formats with the pressure plates, level, tripod sockets and such. I had it customized with my name too. I really like it, it is light and easy to use, the cable release device on it makes a difference.
Sine you have to make a format choice when you load film I often load the film to the idea I have in mind, but I still shoot most of work in 6x6 or 6x9.
The Zero Image is not cheap, but build nice and is a great ambasidor for attracting people to shooting film.