i highly recommend RBR,
simply because it feels awesome,
and is very difficult to master
its the only rally sim i've played that does potholes properly,
if you hit one too fast or on the wrong angle, brace yourself for a rollover :P
the secret to not losing the entire rally is to stick to the lower gears like 3 or 4, makes it easier to recover if something goes wrong, which can happen so fast. i never use 6th gear because by the time i get to it, i dont have time to brake and downshift for the next corner.
hope that bit of advice helps some people