both codecs can be brought into FCP ( as prores )just fine, so this really shouldn’t be your main concern. There are plenty of examples of beautiful pieces ( Vimeo et all ) shot with both, and I’d bet all were edited on FCP…
I’m actually editing a few pieces with footage from both ( actually the previous model GH1 and a 5d). And word is the new GH2 has much better image quality than the last generation GH1.
So for your stated purposes ( ie unlikely to be blown up to the full screen) make your decision with how you like working with the cameras… articulating LCD is really great for run & gun doc stuff, auto focus very useful in doc as well. lots of info out there, try the Philip bloom and DVX user group sites for a ton of opinions.