but I'd suggest looking into a Mamiya RB or RZ. The cameras are plentiful, the lenses are easy to find and inexpensive for the most part, there are tons of accessories, and they're easy to get serviced as they are still in production.
************************************************** *********
Correction. The RB is out of production but the RZ is still very much in production. Mamiya probably has a few RB's still in stock, and places like B&H were selling them in the catalog as of a few months ago. I believe that with so many around they will be able to be serviced for years to come. (Yes, I'm a user of the RB.)