The Shneider Rolliflex 6000 Series.
In medium format the Rolleiflex 6003 and Rolleiflex 6008 use lenses from Schneider-Kreuznach which offer capabilities not available from Zeiss lenses. Your wide format enlargements will look considerably better if you used professional equipment to take the original photograph.
During the 30 years that I photographed ancient Maya pyramids and palaces deep in the rain forests of remote areas of Guatemala and Belize, I always wished I had the lenses made by Schneider-Kreuznach for the Rolleiflex 6008 medium format camera.
But when I was 21 years old I had bought myself a Hasselblad, and went on to buy several more (I currently own a SuperWide C and two Hasselblad EL/M cameras plus plenty of Zeiss lenses).
Every time I peruse the Rollei Fototechic catalog, however, I note lenses made by Schneider which are not available from Zeiss for the Hasselblad.
Overall you can outfit yourself for full professional quality with a Rolleiflex 6008 intergral/E or advanced hobby photography with a Rolleiflex 6003.
Rollei Fototechnic GmbH, Salzdahlumer Str. 196, D-38126 Braunschweig.
Rolleiflex cameras are sold worldwide and are available in every large city or by phone or fax from Calumet, 1 800 CALUMET which is 1 800 225-8638. Calumet also has stores in New York, Chicago, and elsewhere.