Here is another powerful programmable robot from SuperDroid Robots. The SDR Programmable Vectoring Robot has mecanum wheels, so it can easily move in all directions. It weighs 40 pounds and comes with 4 x 122 RPM gear motors and an Arduino UNO controller.
This robot has a max speed of 1.5mph. It has payload capacity of 90 pounds. You can find out more about it here.