ok, i have some advice, you dont have to take it, but bear in mind.
When i was looking for a new off-road electric car, i came across an on-road racer. now, im not into on-road or racing, but when i thought about it, i could modify this little beauty to be a good off-road car.
it worked out cheaper really. if you want to see some pictures, see bottom of post.
the car i used was a 'Yokomo MR-4 BC Super Dog Fighter 2'
this car performs better than i expected, it climbs steep inclins like a flat peice of ground. and has 4 wheel drive.
and when it wants to go, it doesn't hang around!
The mods i made to it are:
Rear suspension < longer shocks
Front suspension < same shocks but i used the old rear springs
Grippy tires < Schumacher 24x6 RIB
Electronic Speed Controller < Very important
Slower motor < again very important
and of course as i am a member of the www.elrc.info
i added our badge to the window!