Chris,
I would def. keep the s2000 if you can afford it, especially if you intend to go to the track often. Buy a california car cover and you will be set. During the harsh winter months I would store it. I personally would not bring my Cayman to the track (Gasp!). I am not wealthy by any means and I intend to protect my toy

I want to keep her for a long time and I would hate to have to get her repaired.
The only way I would sell the s2000 is if your finances are streched. I am glad that you decided to get the Cayman!
Bobby