Buying a second camera for video... which one on a budget

Hi there

I've currently got a 5DIII with 50 f1.8, 70-200L f2.8 IS II, and 24-70L f2.8 lens. I use the system for both video and camera just as an amateur. I use Magic Lantern for video on the 5D3

 

I am thinking of getting a second camera for B-roll stuff and having a multi cam setup for video. Ideally want something that is not too big and images are in keeping with 5D3

 

I have a looked at various options including a used Panasonic GH3, used Sony A600, used Cannon DSLR maybe 70d (for autofocus) or a cheaper 600d. Another option is a point and shoot eg. Canon G7X mark II or G9X

I would be grateful for any advice.

 

Thanks

I would suggest the Pana GH2. Many find the results better than the Gh3 (colours), it offers many options and you get it for little money.