I just got back from the Performance Center (pics and more details to follow soon) with my long awaited Black x5!! I love the car, and actually it seems more spectacular than I remember it during test drives. My question is though, what have people found to be the best wax product? Anyone have experience with Griot's Best Show Wax or P21s Concours Look? Also, does anyone use the Griot's Boar Brush or is a sheepskin mitt better?