Thanks for the replies. As a quick background to why I chose the Pentax 6x7 over other options:
I wanted a camera I could travel easily with (not necessarily to the ends of the earth), by that I was hoping to simply sling the camera over my shoulder without having to worry about a bag. I wanted a slim(ish) package front to back and one that I thought would be solid enough to cope with the inevitable knocks and weather. I considered the Mamiya 7 but the lens prices were much much higher (and I preferred an SLR anyway). I shoot Pentax 35mm and had always wanted a P67 and finding a local dealer with one at a reasonable price was the clincher.
I'm not quite sure it has met the 'sling over the shoulder' test (the prism release buttons seem to be easy to press by accident), and I've had problems skipping the first (and sometimes second) frames on the roll - I think due my initial loading practice. I'm still working on the strap arrangements, when I can get hold of enough strap lugs I'll use a pair of lugs on each end of the strap for security (four lugs). Having considered the almost obligatory wooden handgrip (left side), and experimented with portrait orientation without it (my left hand cups the lens just like a 35mm SLR), I've decided it's more likely to get in the way.
I need to get out with it further afield and more often though.
