Having shot with both of your suggestions, and currently with the 5Dmarkii, at the risk of sounding redundant i'll pardon from the position princiciply of a writer, the minute understanding I'd share of the complete aspects involving your choices as to anyway sway your decision.
However, perhaps if i was to meander in the relms of the unknown and proceed in a way of not selling myself short, i would recommend the DSLR option, be it if you are optioning narrative work, and not that of "Documentary".