I have been using Michelin PS2's on my RS6 for 14 years. They are great. I first had the PS 1's on my 97 M3, loved them, great even wear great traction. The newer versions added better wet road handling. Now the PSS on my M2 are great and my next set for the RS6 will be the same.
I don't care to modify my cars, as I save money for GTO....Gas, Tires and Oil. LOL. Fortunately Oil has not been a problem.
Mike