Stone 13 wrote in post #13436919
Will the 307 handle a gripped 7D, 70-200 2.8 attached or not plus the 15-85, Sigma 30 and 430Ex? I think it will but I'm wondering how much the bag will bulge. Anyone tried to fit a similar combo in this bag?
I can try to help, although I don't have a 307 or a gripped camera ... 
I posted pictures of my 207 with a 5D (ungripped), 70-200L f/2.8, 24-70L, 17-40L, and flash. The 307 is the same bag only 2" wider, which would probably accommodate your grip.
You will not be able to put a camera mounted 70-200 f/2.8 vertically in either bag. However, you may be able to carry it horizontally in the 307, but I don't know that you would have a satisfactory solution for the other lenses and flash at the same time.
I think Rezolution posted a gripped camera photo earlier in this thread also in a 207. Perhaps comparing the two photos may give you some ideas if the 207 or 307 would work for you.
Good luck and let us see what you decide on... 
-howard