Had you asked any advice (I know you didn't!

) I would suggest that you begin with a 531/2 equipped with a Novar Anastigmat. Despite not being a Tessar it is an excellent lens nonetheless, and the camera comes with a galileian (
non-albada) finder which is waaay less prone to be problematic. These cameras are significantly cheaper than Tessars' but they have quite the same quality. It will give you the opportunity to understand if you're in touch with this camera and if you will be going to use it often; then eventually you will upgrade it later (although, as said, there isn't really much to be upgraded). The only thing you would miss is the opportunity to reduce the frame to 4,5x6, but frankly I never really used the reducing mask as it basically turns the camera in a portrait-specialised unit, and I have other cameras with which taking a portrait is much more practical than with this.