I just saw this one and I thought, after almost 4 years, I would give an update:
1. The 997 C4S has been my daily driver.
2. 60,000 miles on her now and no major issues. I replaced the water pump and alternator recently. I do my own mtce so it has been pretty inexpensive to own.
3. Everything is still bone dry. No leaks or sweating of any kind.
4. As expected, I am on my 4th rear tires. These Michelins cost so much. Grrrr!
5. Still enjoying her everyday. No dings yet
Lastly, most importantly, and honestly
6. I do miss the Z. I still troll here and try to be incognito. I still stare at black Zs whenever I see one on the freeway.