I've been using my VA for a couple of months now. The differences between the 5D3 LCD screen can easily be adjusted in the VA brightness, contrast and saturation settings. I have managed to get them looking similar.
It is so good having 1920x1080 resolution to monitor with compared to say a Ninja 2.
One issue I'd like to see fixed is the green cast that the VA seems to display. There are no colour settings to remedy this.
In theory you could use a HDMI audio embedder to get sync audio straight to the VA.