Potential 3.6 Q7 Buyer: Seeking Expert Opinion

Dear Friends,

So delighted to be apart of such an informational and resourceful forum. I am in the process of seriously exploring the right place to purchase a fully loaded 3.2 Premium Q7 to replace my BMW 540i. I have spent couple of hours at my local dealership going through the options that is of my interests and test driving both 3.6 and 4.2 Q7. I am inclined to a 3.2 premium Q7 and possibly end up ordering the exact configuration from Germany. However, I am not able to figure out the pricing that is offered to me is reasonable or not. I truly appreciate if you can help me out to figure out what is the actual dealer invoice price for a 3.6 premium Q7. Also please tell me from your experience what percentage above the actual dealer invoice is reasonable. Since this is my first time attempt for an Audi whatever help I can get from the experts of this forum will be very helpful and thankful.