We got the hitch package (hitch, AT cooler, PS cooler, and wiring harness dealy that affixes the harness to the hitch) put on as an option at purchase time. The cost to us, including installation, was $675 if I remember right. It was definitely no more than $700. I'd work them over a bit on the $1100, especially if that doesn't include installation.
However, as banningjr suggests, check out the other threads on this topic as you may only need the hitch if you are only going to be putting a bike rack on it. If you are indeed going to tow, be on the safe side and get the coolers.
Cheese
