I could give you my take on doing Large Format digital with a Better Light scanning back, should anyone be interested. I am having difficulty getting e6 processed (I do B&W myself) so bit the bullet & bought one.
http://www.betterlight.com/
Resolution, color saturation, acutance beat film (even when compared to my 8x10) hands down. Downside is long scanning time, having to use the lens more open since diffraction limits are problems degrading image so movements are critical, NOTHING can move (makes color fringing rather than a blurred object! so no waterfalls!), and camera rigidity (especially the back where you hang extra weight and a long cord) is important. Lastly, it weighs more but can take 30 or more images (has a 20GB internal hard drive) since you have to pack a computer... but probably not as much as 15 film holders!
anyone interested in more detail?
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