i own an hpi rs4 rally, and i think that its the only 1/10 scale electric rally car that actually does well in off road conditions. other "rally" cars that i have seen all seem to be regular touring cars with a rally body (or tires in some cases) and still are very low to the ground, and have short on-road shocks. but tha hpi rs4 rally has higher ground clearance, longer shocks, and an inner body cover that keeps dirt out of the belt drive. of course in addition to the rally specific tires.
it can actually jump pretty well too.