Congrats on your new beast. Honestly, since you have the N63tu, you should be bereft of any major issues. The tu (updated N63 engine) came with many improvements, which also helped extinguish some of the reliability issues with the original N63.
Also, the N63tu is far more tunable and capable. Throw a tune on her and she'll be giving some exotics a run for the money.
Enjoy the new ride.
