<p>I am late to this thread, but will add my two cents for what it might be worth. I have some of the cameras you are considering (once had a Mamiya C330 but no longer). The Rolleicord wins for lightest weight and gives an excellent negative. The Hasselblad V series wins for practicality, that is, interchangeable lenses and backs. The Rolleis, (2.8F and Tele-Rollei) win for ease of use and plain old fun of using. If I am shooting only one kind of film (I use B&W the most) and have the space, I'd much rather use the Rolleis than the Hasselblad. The Hasselblad is preferred if I am using more than one kind of film. Interchangeable lenses, in my opinion, are somewhat overrated in medium format. At one time or the other I've had Hasselblad focal lengths of 50, 60, 80, 100, 120, 150 and 250. Now I have only an 80 and a 150. These pretty well match the 80 of the Rollei 2.8F and the 135 of the Tele-Rollei. Since I am now older and shoot mostly for fun, if I had to choose I think I'd keep the two Rolleis. Whatever you decide, use it a lot and be happy!</p>