I'd go with the 4wd of the Revo. I have only one 2wd vehicle left, and that's my T2, but it's earned its keep by being super durable for bashing. However, it does not have the kind of traction for doing serious off road bashing, and will loop out with the power of the Lehner if I don't coutersteer and control throttle input. Even my 18MT is 4wd, man does that make a gigantic difference in such a small car when you're bashing it.