I own both cameras( 200 and 7D) and a redrock for the Pani, and in a nutshell ....... 7D all the way.
however, for "P2", Assuming you are talking hxv200 or 170....if it's a big brother then that might be a different story.
As posted by some above, You need to have separate sound. I came to the conclusion that the sound is so bad in the pani that I record separate sound for that also.
To avoid Moir in the Canon, try to do tests shots with wardrobe and have a HDMI monitor setup when ever you can. If Moir occurs in the background, just cheat it out of focus a bit either by moving your subjects away from the background or shooting more shallow. However, you still may run into a little Moir in post.
Rolling shutter....., by not waving the camera around like an idiot, I don't have too much of an issue. I will switch to 60fps (to convert to 24 in post), if I think I may have an issue. Like if someone is walking/running in a shot with a bunch of vertical lines. Note, fast zooms also do weird stuff too.
