Thanks. That was the way I was leaning. I was confused by the description by BMD about the sensor being 4/3. According to their spec., the active sensor size of the BMD is 61% that of a 4/3 sensor. I'm a novice, but nearly 40% smaller seems a pretty big chunk to me.
I do have reservations about the GH2, but I need a fairly inexpensive camera for the microkopter that is light but gives good HD quality. I haven't ruled out the GoPro yet.
I don't like the thought of a $250 firmware upgrade for the AF. Panasonic need to reconsider.
It sounds like most of your work is without sound?
I would go with a GH2 and then hack it.