I started getting into aerial photography with quadcopters last year (fun little hobby). I don't have any of the ones mentioned...but I'll share a little of what I've learned.
I initially jumped right into something I could use with my GoPro. I bought an RC Logger Extreme, which is an awesome little quad for the money. It's also very powerful and relatively easy to break parts just starting off. Fortunately, you can get replacement parts easily and cheap. After I rebuilt this thing like 4 times and now have enough parts to build another, I decided I probably need to learn how to fly one first...imagine that! :blush: So now that I've accepted my lack of skill with these little bastards...I walked into the local hobby store and bought a Blade Nano QX. After a little while I got the hang of it and its been a blast messing with the dog around the house.
Now that I can at least fly, I've been able to get great footage with the RC Logger. I now want a gimble and ability to carry heavier cameras. I'm in the process of building an octocopter with my newly aquired rc helicopter building knowledge. The hardest part of the learning curve with these is the complicated controllers and software.