I must say, I have owned all the cars except for the Tamiya. The Yokomo is the most durable (with a rubberneck) I have broken nothing, most my others I break C hubs or arms. As far as drivetrain the Yokomo is the smoothest thing next to a shaft car. No Xray or any belt car spins as smooth or as efficiently as the Yokomo. As far as wrenching, the Yokomo is cool and easy for diff access and belt tension is easier than anything else, but just to get batteries soldered up and do motor work is a royal pain. I guess you have to give some to get some.
Ummmm, every car is durable with the stiff bumper. GO P-DUB!!!!!!!!!