I have a P3S and I love it and will be keeping it. I would really like way more range and possibly a better refresh rate on the camera. Since I already have two batteries I think a P3P or P3A better fits my budget than a P4. Another thought I had was if I crashed and broke a camera, is a P3S camera compatible with a P3P or P3A. I would assume not the P3P but maybe the newer P3A that has the 2.7k? Does anyone have any input on this?