I agree, the new steering wheel is definately an upgrade! The old steering wheel felt funny and wasn't round (very obvious when turning the wheel quickly).
The problem with the Pirellis is that they are shit. Replace them with something else when they wear out. Pirellis are the worst tires I've ever owned. I had the PZero on my C55 and the rears lasted 3k miles. I replaced them with Michelins and they've got 7k miles on them now and still have about half tread left. The fronts made it to 8k miles and they were out of round and road horrible so I replaced them with 4/32s tread left with Michelins to get my sanity back.