Re: moving to 5D mkII from Z1/EX1r - advice
 

I love my EX1 and I love my 5DMkII

For documentaries i use the EX1. One f the best crips HD video images at this price point, good sound in a camera designed for video. I'd use my 5D as a B-camera when I need shots where the EX1 doesn't fit or a specific lens is required (super wide or Super tele etc)

For a low budget fiction, hands down I'd use the 5DMkII. Again there is nothing like it at this price point for controlling DoF. I'd probably use the EX1 as a B camera or even in tandem for sound acquisition. Still, kitting a 5K for video (follow focus, view-finder, matt box, rods etc is not cheap.

I really don\'t see why I\'d choose one over the other, even if I was only going to do documentaries, I\'d still need a still camera.

Keeping your EX1r and getting a 7D may save you some money and still give you most of the advantages of the 5D

best of luck