:xoutpost: When I was in market to buy my curent 4.8is X5 I configured a 4.4i and it was almost $60k but still a 4.4 engine. So I decided to spend more and get a different engine and not worry about putting 4.8 bumper kits and all. And when i have to sell i can sell as a 4.8.
On a 4.4 you can get a gas mileage of 22.
I prefer the sport seats. I don't think you can do anything about rear seats.