No, I didn't go for the performance upgrade since I went with the 19" all season tires because I drive up to Northern Michigan so often. Dealer felt that unless I went with the performance tires, extra power would probably not be worth it. He races BMW's, so I took his advice. Still have to wonder if I should have done it. But I did go with all packages (sport without 20" wheels) and all options including soft close doors, active ventilated seats, HUD, premium sound system (which isn't really very good but better than the base system) etc. Even with the standard 400 horses I won't have much opportunity to really drive it around here in the DC metro area. To be honest, one of the reasons I went with the X6 vs. a 535xi was I needed to have something bigger so that the turkey drivers around here won't be able to run me off the road any longer. DC is full of a lot of angry people who take their anger out on the road. This will be my 10th BMW, but first since I got rid of my 1989 530i (which was a real dog) and went to Mercedes.