I think Mamiya 7ii is a wonderful camera if you can accept its limitations. You can get some great deals on the used market. As a street shooter it is not as fast as a Leica. Although, a Leica camera can be slow to operate in the wrong hands. I have missed shots with my Leica which I thought were in focus or the wrong part of the scene was in focus. I believe most of the time this comes down to camera technique. Pre-empting the situation before it unfolds in front you. Seeing the 6x7 negs developed for the first time was the deal clincher for me. It maybe worth renting the Mamiya 7ii or take a roll or two 120 film with you to the camera store. Get the film developed and decide from there. Good luck!!