Another issue to consider aside from quality is latitude. The Vision2 stocks give you a huge amount of leeway in exposure while still being a high speed film. Digital on the other hand tends to have alot of trouble handling extremes of light and dark. This can make doing things like shooting a night much more difficult. If your production looks to have many night or low key lighting scenes I would be careful about choosing digital. You can still acheive a good image with digital in these situations but be sure to always use a properly calibrated monitor to be sure. I have personally never shot on an HD camera so I can't say if they handle low light better