I will be bringing it into the shop today. I had thought it was my tires initially, but I got the exact same noise with my both my summers and my snows. The car doesn't get driven much these days, I drive my 6 to work and the 3 is mostly for my wife but she rarely uses it. I do drive it to Watkins Glen on weekend I work at the track, its about a 180 mile trip, but I hardly had time to do that last year, so the car is pretty dormant. (and no I haven't had the car on track in anger).
Hopefully I'll find something out today...no idea what a repair may cost at this point.
Is this a rocket science replacement? I trust my shop with oil changes, tire rotation, and he's done the brakes, which seem to still be working..He's much cheaper than the dealer.