I assume the issue with wheels and the P4C is with the rear wheels. Is there any problem with the Zipp 1080 or Stinger 9 for a front wheel with the P4C?
The only real problem with the 9 could be the front brake. Even on my P2 the brake barely opens enough to clear the tire with enough tension on the cable so that it fully opens when released. My insomnia destroying blog can be found here http://tfalin.blogspot.com/