Another plus to the Big Tow Pkg is the big mirrors. They really help when parking. Also i believe the gearing ratio is different which allows more pull off the line, but may affect gas mileage. My main reason for getting the Big Tow was the VDC system.
So for only $600 you get the larger extendable mirrors, VDC system, Class IV hitch w/pre-wiring (9400/9500lb tow cap.), and transmission cooler. A class III hitch will run you $200 plus installation costs (generally $60-75/hr) and only allows 5000 lb tow cap.
Just food for thought when making your decision.
