Fighting your own Future?
I know I'm late to this discussion, and you may have already acted on this, not to mention there will be a howl and cry at this suggestion.
I would submit to you that it is time to move on.
For the type of work you do the H system is a better, more integrated fit. Like many V users, I was a die-hard advocate and worked with both a 500 system and 200 system for decades ... up to and including a CFV back (my review of the then new CFV was on the Hasselblad website under the "Word" section).
I left that behind, and for professional applications never looked back.
Consider this:
For the price of a CFV/39 or a Phase One P45 back you can get a mint H3D-II/39 complete. In terms of the sensor itself, there is no difference between the CFV/39 or P45 and the H3D-II/39. None. They are all 39 meg Kodak sensors.
If you prefer the Zeiss V lenses, you can secure a CF Adapter and use any C, CF, CFi, CFE lens you may already own, and it is all automatic stop-down aperture and shooting ... just like on the V camera.
The gain you get is focus confirmation in the viewfinder when manually focusing, a viewfinder that exactly matches the sensor capture area, very accurate TTL exposure metering, easy ergonomic ability to shoot in landscape or portrait orientation without removing and turning the back, a larger LCD preview, the ability to set a mirror delay in various m/s increments for hand-held shots at lower shutter speeds, and fully integrated back and camera body from the factory with no back shimming required for critical accuracy.
Plus the option to add key AF lenses that are highly tuned for accuracy, and quite fast focusing, plus sync to 1/800th instead of 1/500th.
All HC & HCD lenses are now fully profiled for distortion and CA corrections in both Phocus and Lightroom RAW processing software, you then have the option of a true W/A coverage with the HCD/28mm, the possible inclusion of two excellent AF zooms, AND the eventual option of securing the HT/S1.5 Tilt-Shift unit some-time in future which takes all lenses from the HCD/28 to the astounding HC100/2.2, plus extension tubes. In other words, growth is not limited.
There is a reason that the H kit is the number one tool of fashion and glamor shooters worldwide.
I would have advised against the Phase One back for two key reasons. It requires a sync cord from the V lens to the back (which from experience instantly become the weak link in the process of shooting and the product of misfires all to often) ... and to shoot in portrait requires removal of the back to turn it. This exposes the sensor to both electronically attracted dust like a magnet ... and more importantly, accidental damage to the IR cover glass ...which happens more times than you may think. That is an expensive repair that has to be sent back to the factory to be done which takes weeks and weeks.
I fact, I'd advise searching very hard for a nice H4D/40 ... I sold one without a lens but otherwise complete for $12,000. 7 months ago. Then a whole new world of possibilities would be in your hands.
My 2¢ on the subject.
-Marc