Good for you!
My problems are now being centered around (not so round) tires. I have 18" Conti's M&S. It would also appear that a lot of people, and I mean A LOT, are having this problem too. Porsche and Continental must be going nuts with this one. My low frequency noise seems to have dissipated on its own for now. I only have 2400 miles on the clock. So from what I've been reading, I guess I can expect it to creep up later on. My build date was 03/03.
Best of Luck!