But you are right, i think i am going with the 5d2 (if he has not sold it yet....)
That's good to hear
But are you sure you are talking about the cinema camera, cause the cinema camera should be a super 35 sensor
No, the sensor size ->15.81mm x 8.88mm

As you can see if not , and that's the problem if it was super 35mm then I would have recommended it

Link to the BMCC spec -->
http://www.blackmagicdesign.com/products/cinemacameras/techspecs/W-CIN-01You would have to buy the 4k version to get Super 35mm (22mm x 11.88mm) but its not really Super 35mm just under.
DeafEyeJedi is right thou if you can find the funds I would get a 5D3 its the Best cam for raw and it beats all cameras in that price range.
But if we are talking about only the 5D2 & the BMCC then it the 5D2 all day long .
Just compare the footage and you wont need anyone's opinion.
I have being doing that for a few day now and the 5D2 is a lot cleaner , I have 1.7TB of BMCC 2.5K raw footage I have to fix the noise.
Don't get me wrong its good footage but for video not for film , other thing that bothers me is the skin tones are not as good as Canon
seems to lack good mid-tones , there again it's Just My Opinion so take it with a gain of salt