The way I see it, every medium format camera is some sort of compromise; considering what you have here- the Makina is pretty much compromising everything else to be the smallest 6x7, the Mamiyas are the best possible lens resolution with build quality & cost sacrificed, the Koni Omega was made to be a tough press camera- it's huge, heavy and not ergonomic. You aren't going to find something as well rounded as the Leica, not in medium format, so if you can give that up, I would suggest you either stick with the Rolleiflex or look at Hasselblad, those would be the best build, serviceability, and slick user experience, which is what I think you are looking for.