What a wheel/tire day for me!!!! From one extreme to another...
It started out dealing with a seller of new F1 Eagles on Ebay that was quite humorous! She clearly did not have the tires, or wanted no part of a transaction that involved face to face cash, despite my assurances of police presence or doing the swap in a crowded shopping mall. She had no time for that, studying for exams ;-)????? SCAM... I alerted the winner to beware...
That past me, I called CCW and talked with John.... VERY INFORMATIVE on wheels/tires for a Z06, is an understatement!!!! I hopped in the truck and drove to Daytona. I caught John cutting a new 19" wheel... VERY NICE. His offerings look to be expanding....!!!
I did the "17 vs. 18 inch" discussion with John, we reviewed the tire options, the plan, and I settled on 18x11 and 18x12s wheels. Choices in stock for tires.... Either GY slicks (315/335), or Pilot Sports (275/335), or Hoosiers. He also showed me the double secret, not for sale: GY slick tire with 4 deg of neg camber built into the tire!!!!!!!!!!!!!!!!!!
John was very patient with me, did not press, and reviewed things so I could I could make the best decision for me.
I ALMOST walked out with 2 sets of 315/335 GY Slicks (actually1.5 he was missing 2 rears) !!!
ALL STOP--- I got spooked. The wife will flip if I pull into the driveway with the pickup loaded with multiple stacked sets of slicks and new wheels that will not be mounted for another month.
I decided that at this time, this was just a tad too aggressive for me, but I wanted the wheels to EVENTUALLY do that. So STEP 1-- I took the wheels with the Pilots to run daily so that I can get used to the look and feel, and ensure (deal with) fitment issues while I run my Eagles a few more times at Roebling.... John ensures me they will work no problems. I do need to pull the rear brake ducts, no big deal. THIS WINS WIFE POINTS. She loves the CCWs as the daily ride, hates the stocks.
The Eagles drift a little too much for me on the track and while that is fun, I think I am ready for a little more "stick".
STEP 2.
When the Eagles die, I will strip the Eagles off the stock rims and mount an intermediate tire... ~KUMHOS V700s on stocks, and run those on the track a few times. Brad-- that is probably what I will run at Road Atlanta when we hook up.
STEP 3.
When the Kumhos DIE, the stock wheels go back to new EAGLES and become daily drivers again. ;-) By this point I can pull the red herring on the wife... PULL the Pilots and run GY slicks there after.

The CCWs become the track wheels.
STEP 4 (a few years down the road)... I want those neg camber tires. WOW!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!
This strategy solves all my problems in a paced, but timely fashion as I get more track time.
THANKS to Subdriver, DJ, Mark and everyone who helped me generate the PLAN!!!!