The GH4 seems to be the darling of the moment. i don't fly one but keeping a close eye on how they perform.
Lots of knowledgeable and experienced folk here who have helped me and many others keep it up so to speak.
Welcome to the forum Dave. In my opinion to get the most out of the forum read as much as you can and learn how to search the MultiRotor Forums. I will ofter do a google search and choose the items listed from this forum. there is many posts and threads on the GH4, and eventhough I am a 5D2 person the GH4 seems to be very popular. I might also suggest that you start here: http://www.multirotorforums.com/foru...ons-and-Lounge!!! it would be good to read the top items - "Understanding Lithium Polymer batteries", "Group Build, DJI NAZA/F450 Quadcopter!", "Multi-Rotor Heli abbreviations, acronyms, secret codes, etc.!". I hope this is not to basic since you have some knowledge already.
Hi Dave and welcome to the forum. I am filming at York's Sports village tomorrow (well early am and mid pm) and I have a 5D3 and GH4. Very happy to chat things through with you if you like if I get a chance between flights. PM Sent