I'm with JimGalli--A Mamiya Press with a 90/3.5 (a Tessar design) will smoke just about any folder out there, and when you've got a little more money you can upgrade to better glass, like the Planar-design 100/2.8 or Biogon-design 50/6.3. These are robust cameras that (other than sometimes needing rangefinder adjustment) stand up very well over time. Folders are far more likely to have serious mechanical issues.

Just watch what back you're getting--there are a lot more 6x7 backs out there than 6x9s