I would go with ShredderGuy, I have a hurricane, that I modded using the electric components of an 8e. 3200Mah 20C batteries mated with the esc that is rated for 80A. I normally drive the car but stop before the batteries die off of a fresh charge, so I'm not sure how long the run time would be for sure. With the springs stiff in the rear I can wheelie all day *with the tire I have on it*. You actually have to soften the spring to keep it on the ground.
I also have the Avalanche but I got one of the first ones out. They have had problems with my internal diff gears blowing up and have not run itsuccessfullyyet. Redcat is sending me parts to try to correct the problem. I'm hoping that they will arrive today.