D8 - Cheapest
8 2.0 - needs a loose driving style, and on the expensive side
H9 - looks like a 1/10 scale imo, but I don't know much about the car but the angle of the motor makes it hard to get to the rear drive shaft
mainly it's up to how much you want to spend
I'd say Losi because I drive Losi but that's being manufacture bias