Get both. Or get an X-factor or something with a lot of axle dexterity for rock climbing and something nitro for bashing. Electrics are better suited for slow crawling. Nitro's work better for higher speed. Not saying that you can't get a lot of torque out of a nitro, but if your crawling around at 1mph, your going to have a very difficult time keeping the engine from overheating. Also, clutch shoes are going to hate you from all the slipping and whatnot.