It really took you guys this long to get them? We've already had some in for service over here. Theres really nothing different looking from the outside, other then the 550i badge. But under the hood is the new 5.0 engine which they also have in the 750i's. Since BMW came out with this new engine there is no more 4.4 engines in production. Im not sure about the 4.6 and 4.8 which they offer in the X5 but Im sure the X5 5.0 is comming sometime.