I have used the Mamiya but not the Rolleicord. But have used a Rolllei T which is similar in size to the Rolleicord. Question: what are you planning to do ? If you are lugging the gear over the landscape you will find a bag full of Mamiya equipment is pretty hefty - but will provide superb results. The smaller / lighter Rolleicord will also provide good negs and will be more portable, but of course you will only have its fixed 80mm lens to use. If you are not planing to carry this gear far I would go with the Mamiya as it is a superb and reliable 6x6 camera with plenty of good S/H 'system' items about at very affordable prices. The Autocord is a good suggestion as well. A friend of mine uses one and obtains excellent results.