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Though, Black Magic Pocket Cinema Camera beats every Canon Camera when it comes to dynamic range.....
I would disagree with you. Dual-ISO reachs 14 f-stop DR. This is near or more than the most expensive cameras out there can do right now (there's lots of other issues, of course, such as aliasing). If
this is right, BMPCC is only 0.5 stops better with normal iso. With the
ADTG research Canon cameras could supersede that 0.5 stops (current gains on MKIII seems to be around 0.8 stops, so 0.2 better).
Also, BMPCC has a smaller sensor, compared to Full-Frame sensor of 5D's.
Besides high-end cameras from Arri, Red and Sony, I seriously think 5DMKIII is the best choice. Of course, it doesn't have PL mount and other stuff but the quality is very good.