Frankly, I never would have purchased the '08 (a) because I would NEVER pay more than MSRP for ANY car and (b) I'm extremely wary about anything new. I had a '70 Challenger, and I can assure you there were a LOT of flaws in it that were corrected in later models.
That said, considering what you've purchased, I would not change a THING about it. You'll have one of, what?, 6,400 or so? You also have a car that more than likely cost you more than $50,000 (assuming a relatively modest mark-up). My God ... you spend that much money -- literally as much as my house cost -- and you want to alter it for something as trivial as the interior color? WHY????
Enjoy what you're getting. It's going to be a beautiful car -- and one that very well could finance a comfortable retirement for you one day.
