I, too, just got a 4.8i X5. Mine is Space Gray with black interior and the bamboo wood. I ordered it with the Technology Package, Premium Package, Sport Package, Premium Sound, Satellite Radio and I put 21" BMW wheels on it-- it really looks great.
I've only had it a week, but I'm very, very happy with it. Its my second X5 and the improvements in all areas over the previous version are impressive. The one negative would be with the new transmission gear selector-- I'm okay with it, but have you gone to a car wash or left the car with a valet yet? No one knows how to operate it! I have to drive it through the car wash myself! I'm not looking forward to this inconvenience.
Other than that, I'm really enjoying it. Initially, I wanted a 5-series wagon, but I didn't want to "settle" for a 6-cylinder, and since they no longer make an 8-cylinder wagon, this seemed like the next best option.