RE: whats best for Jetcat P20
My favourite is the Toki Ducty but they are in very short supply and I'm not sure if you could get hold of them in Australia. I like mine so much that I have a spare kit at home in case I damage it.
I also have a Habu 32 and it is a good subject for conversion and flys quite nicely. I find it a little more stressful and not as 'fun' as the Ducty. I have a JT Hawk as well that I haven't built yet but it looks like it will be OK. It is quite a bit more expensive than the Hobbyking version and am not sure how much better it is.