I want to thank everyone for the quick and thoughtful replies on a back up camera system in a previous thread, but now my question turns to Leica and the S2 model.
For me this seems like an ideal camera, because of the large MFD sensor, battery, the weather and dust seals and the choice of using either focal plane shutters for speed or curtain shutters in the lens for high flash sync.
Cleaning a Hasselblad is easy as the components are accessed quite readily. However, this convenience I think, leads to it's ability to "get dirty" more frequently. I do enjoy cleaning gear, just not as often. Weather sealing for me is a big deal and surprised there's not more on the Hasselblad. I have read some shoot with the H4D with no issues in weather, but I err on the side of caution. As for the Leica S2, i've read reports of noise at high ISO and a base of only 160. Also, with Leica you have to pay extra for better customer service that seems to be standard with Hasselblad.