Thanks very much guys :)
I had the hacked GH2 before this and I feel that the GH3 handles dynamic range and sharpness a little bit better.
I'll admit though it's not a huge leap when you consider the price difference.
However features like the headphone jack, OLED screen (which looks gorgeous, much easier to focus from), wi-fi functions and 1080 50fps shooting help justify the upgrade for me.
Not to mention what [i]could[/i] happen if the GH3 ever gets hacked!
Not too sure about the moire. I've noticed it on any of my shots, but I still need to shoot more to know for sure.