Need help getting the best deal

I have a 2007 GT Mustang ordered. I have a price quote of $26,106 on my dream car. I allready have the vin and a delivery date of the first week in August. I have a pretty good credit score and reputation(paid cash for three new cars since 2005 for wife, kids) so I did'nt have to put a deposit to order this car with the salesman.

What incentives can I look for, what would be resonable to ask for; such as prepaid Sirrius subscription, interest rate(yea I gotta finance this one), full tank of gas when I pick it up, ect.. Because I swear if they dont at least act like they are giving me a deal I am not gonna buy it when it gets here, but I want this car so bad.

I need you guys experienced advice on this subject.:hail2:
 
first tank of gas is almost always a given. i dont know about the satellite radio, thats a new feature this year, and didnt affect me any. you could negotiate it in the deal at no extra charge. is the quoted price MSRP? or less than MSRP? depending on where the numbers sit as is, you might be able to negotiate more. tell them to throw in free window tint too!
 
window tint

We cant window tint in Mississippi. Chrystal meth is the excuse law enforcement used to get that law passed in march of this year. And that is a bad problem here.

I have hear that the dealership that I have my car ordered from offered some of the cobra purchasers 36 months of free sirrius subscription with that option.