well.... I guess this will take some getting used to... the lack of "action" on the X6 forums... just not enough of these cars on the road or owners on these forums i guess... I have an X5 e53 and that forum has a lot of posts and replies to every topic imaginable..

After doing some googling regarding different tires decided to get off of the run flats and onto standard tires again.. pulled the trigger on the Nitto Motivo's 275/315's...

I did this to my Corvette convertible which was way too loud with the OEM run flats and made a world of difference to the interior volume.. quite frankly never noticed a difference at all in the driveability.. Hopefully the same holds true for the Motivo's on my X..