I am happy to say I am now the proud owner of a 501C/M Hasselblad with 80mm Planar CB Carl Zeiss lens :-)
It arrived today and seems to be in great condition. Cost me £1400. I have had a hold and a play and love the feel of it already. As soon as I picked it up it screamed "quality, sturdy" at me. Looking down the viewfinder for the first time was quite an experience - it looks amazing with the Acute Matte D WLF. Though this "left is right, right is left" business will take some getting used to!
Below is a picture of me with my new prized posession. Strange how life works - a thief walks off with nearly all of my Nikon kit and the end result is I am now a Hasselblad owner. I can't wait to get some film and shoot a few scenes.
I say again - thanks to everyone who has spent so much time advising me and guiding me through this bewildering experience of moving from 35mm to MF (note - I still have one Nikon F5 and I just bought a new 50mm prime for it, so I'll be multi-format now).