Hey Karl,
since you’re interested in film, the BMCC could very well be a very good idea. But beware that you will need to buy a few extras to make it work well, and will need to spend at least around 1000 € extra. You might want to check out the the Blackmagic Pocket Camera, unless you really want 2k.
The most important thing: You need some kind of external power. V-mount batteries with a d-link to bmcc power adapter cable.
The LCD screen is pretty much a mirror if you shoot outside even on cloudy days. So you will need a LCD Hood, an electronic viewfinder or a LCD Monitor. You can even use a T-Shirt, I’ve done it and its not too bad… but not as comfortable.
And you will also need a basic rig, just to be able to hold it comfortably.
If you decide to record sound directly to the cam you will need a XLR to 1/4 Jack adapter or some kind of Audiorecorder. I use the Tascam DR-60D and connect it with a mini Jack to a 1/4 Jack cable, and it works very well for my needs. You can screw the Tascam on top of the camera, even though its made for DSLR to screw under, and use the Line output to connect to the cam.
In terms of image quality and dynamic range, the BMCC is a very good deal. I’m very happy with my BM Production Camera 4K. They are not very good low light cameras, but if you light your scenes, like it should be done, you will get some very nice results.
“Always look on the bright side of life” – Monty Python