The Panasonic Lumix GH3 has improved it's audio over the Lumix GH2 by adding a 3.5mm mini-jack input and including much needed audio monitoring. This has made it into a capable production camera.
We completed a 13 episode drama using the Panasonic GH3 as our main camera and couldn't have been happier with its performance. Audio in particular was great using a JuicedLink attached directly to the camera's audio input.
Panasonic GH3
JuicedLink Riggy assist
Check out our microphone / audio shootout on the Panasonic GH3:
• Panasonic GH3 Audio and Microphone Test