Has anyone one had any experience with the new caterpillar ct 660. I know its a international motor etc.Im looking at the cat ct 15 motor. It might be new truck time and Im drawn to this truck because of the cat support ive experinced with my equipment has been phenomenal. The looks of the truck are really growing on me. Ive test driven them etc but would like to hear from someone that has used them in the field.