Something interesting - looks like Futaba is good.
This bloke just told me he went 15klm (as per the video) with this gear'
I know 15km is possible with futaba 9c and r319dp rx with 404 cm antenna wire.
I TRIED TO ASK HIM ABOUT THE 404CM ANTENNA BUT DO NOT UNDERSTAND HOW THAT SIZE ANTENNA WOULD GO ON THE FUTABA 35MHZ BUT I DO NOT KNOW ANYTHING ABOUT THE 9C.
HE ALSO SAID - Here the same: I use 35MHz rc radio with 404cm long antenna and 2.4GHz video downlink.
So the 9c would be for me if I wanted to spend that much.