Out of interest, how much does a certified Phase One 45+ back (without body or lenses) in M mount and EX+ condition, 10K-30K exposures exposures, cost through a reputable dealer? With my Linhof Techno just clearing customs, I'm starting to look around to get an idea of how high I need to aim for to set myself up with a digital capture solution. I won't be buying for at least another twelve months, but it's good to know how high the bar is set. In the mean time I'll shoot the Techno with a 6x7 film back.
If anyone wants to know, I'm looking at the P45+ primarily because of the larger sensor size and longer exposure capabilities. I'm not often in the realm of extreme long exposures but I'd like to know I could do it if needed. A P65+ might be the best fit for me – forgetting for a moment the IQ series backs – but I think they might be out of my league money wise.